@article{garland_song_ma_kim_vazquez-guardado_hashkavayi_ganeshan_sharma_ryu_lee_et al._2023, title={A Miniaturized, Battery-Free, Wireless Wound Monitor That Predicts Wound Closure Rate Early}, volume={7}, ISSN={["2192-2659"]}, url={http://dx.doi.org/10.1002/adhm.202301280}, DOI={10.1002/adhm.202301280}, abstractNote={Abstract}, journal={ADVANCED HEALTHCARE MATERIALS}, publisher={Wiley}, author={Garland, Nate T. and Song, Joseph W. and Ma, Tengfei and Kim, Yong Jae and Vazquez-Guardado, Abraham and Hashkavayi, Ayemeh Bagheri and Ganeshan, Sankalp Koduvayur and Sharma, Nivesh and Ryu, Hanjun and Lee, Min-Kyu and et al.}, year={2023}, month={Jul} } @article{song_ryu_bai_xie_vázquez-guardado_nandoliya_avila_lee_song_kim_et al._2023, title={Bioresorbable, wireless, and battery-free system for electrotherapy and impedance sensing at wound sites}, volume={9}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85148551109&partnerID=MN8TOARS}, DOI={10.1126/sciadv.ade4687}, abstractNote={Chronic wounds, particularly those associated with diabetes mellitus, represent a growing threat to public health, with additional notable economic impacts. Inflammation associated with these wounds leads to abnormalities in endogenous electrical signals that impede the migration of keratinocytes needed to support the healing process. This observation motivates the treatment of chronic wounds with electrical stimulation therapy, but practical engineering challenges, difficulties in removing stimulation hardware from the wound site, and absence of means to monitor the healing process create barriers to widespread clinical use. Here, we demonstrate a miniaturized wireless, battery-free bioresorbable electrotherapy system that overcomes these challenges. Studies based on a splinted diabetic mouse wound model confirm the efficacy for accelerated wound closure by guiding epithelial migration, modulating inflammation, and promoting vasculogenesis. Changes in the impedance provide means for tracking the healing process. The results demonstrate a simple and effective platform for wound site electrotherapy.}, number={8}, journal={Science Advances}, author={Song, Joseph W. and Ryu, Hanjun and Bai, Wubin and Xie, Zhaoqian and Vázquez-Guardado, Abraham and Nandoliya, Khizar and Avila, Raudel and Lee, Geumbee and Song, Zhen and Kim, Jihye and et al.}, year={2023} } @article{wang_azimi_zhao_kaeser_sánchez_vazquez-guardado_rogers_harvey_rainer_2023, title={Optogenetic activation of visual thalamus generates artificial visual percepts}, url={https://doi.org/10.7554/eLife.90431}, DOI={10.7554/eLife.90431}, abstractNote={The lateral geniculate nucleus (LGN), a retinotopic relay center where visual inputs from the retina are processed and relayed to the visual cortex, has been proposed as a potential target for artificial vision. At present, it is unknown whether optogenetic LGN stimulation is sufficient to elicit behaviorally relevant percepts, and the properties of LGN neural responses relevant for artificial vision have not been thoroughly characterized. Here, we demonstrate that tree shrews pretrained on a visual detection task can detect optogenetic LGN activation using an AAV2-CamKIIα-ChR2 construct and readily generalize from visual to optogenetic detection. Simultaneous recordings of LGN spiking activity and primary visual cortex (V1) local field potentials (LFPs) during optogenetic LGN stimulation show that LGN neurons reliably follow optogenetic stimulation at frequencies up to 60 Hz and uncovered a striking phase locking between the V1 LFP and the evoked spiking activity in LGN. These phase relationships were maintained over a broad range of LGN stimulation frequencies, up to 80 Hz, with spike field coherence values favoring higher frequencies, indicating the ability to relay temporally precise information to V1 using light activation of the LGN. Finally, V1 LFP responses showed sensitivity values to LGN optogenetic activation that were similar to the animal’s behavioral performance. Taken together, our findings confirm the LGN as a potential target for visual prosthetics in a highly visual mammal closely related to primates.}, journal={eLife}, author={Wang, Jing and Azimi, Hamid and Zhao, Yilei and Kaeser, Melanie and Sánchez, Pilar Vaca and Vazquez-Guardado, Abraham and Rogers, John A and Harvey, Michael and Rainer, Gregor}, year={2023}, month={Oct} } @article{kim_yang_zhang_li_vázquez-guardado_park_wang_efimov_dou_wang_et al._2023, title={Remote control of muscle-driven miniature robots with battery-free wireless optoelectronics}, volume={8}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85146485752&partnerID=MN8TOARS}, DOI={10.1126/scirobotics.add1053}, abstractNote={Bioengineering approaches that combine living cellular components with three-dimensional scaffolds to generate motion can be used to develop a new generation of miniature robots. Integrating on-board electronics and remote control in these biological machines will enable various applications across engineering, biology, and medicine. Here, we present hybrid bioelectronic robots equipped with battery-free and microinorganic light-emitting diodes for wireless control and real-time communication. Centimeter-scale walking robots were computationally designed and optimized to host on-board optoelectronics with independent stimulation of multiple optogenetic skeletal muscles, achieving remote command of walking, turning, plowing, and transport functions both at individual and collective levels. This work paves the way toward a class of biohybrid machines able to combine biological actuation and sensing with on-board computing.}, number={74}, journal={Science robotics}, author={Kim, Yongdeok and Yang, Yiyuan and Zhang, Xiaotian and Li, Zhengwei and Vázquez-Guardado, Abraham and Park, Insu and Wang, Jiaojiao and Efimov, Andrew I. and Dou, Zhi and Wang, Yue and et al.}, year={2023}, pages={eadd1053} } @article{park_yoo_yang_jung_vázquez-guardado_li_kim_shin_maeng_lee_et al._2023, title={Skin-integrated systems for power efficient, programmable thermal sensations across large body areas}, volume={120}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85147162649&partnerID=MN8TOARS}, DOI={10.1073/pnas.2217828120}, abstractNote={Thermal sensations contribute to our ability to perceive and explore the physical world. Reproducing these sensations in a spatiotemporally programmable manner through wireless computer control could enhance virtual experiences beyond those supported by video, audio and, increasingly, haptic inputs. Flexible, lightweight and thin devices that deliver patterns of thermal stimulation across large areas of the skin at any location of the body are of great interest in this context. Applications range from those in gaming and remote socioemotional communications, to medical therapies and physical rehabilitation. Here, we present a set of ideas that form the foundations of a skin-integrated technology for power-efficient generation of thermal sensations across the skin, with real-time, closed-loop control. The systems exploit passive cooling mechanisms, actively switchable thermal barrier interfaces, thin resistive heaters and flexible electronics configured in a pixelated layout with wireless interfaces to portable devices, the internet and cloud data infrastructure. Systematic experimental studies and simulation results explore the essential mechanisms and guide the selection of optimized choices in design. Demonstration examples with human subjects feature active thermoregulation, virtual social interactions, and sensory expansion.}, number={6}, journal={Proceedings of the National Academy of Sciences of the United States of America}, author={Park, Minsu and Yoo, Jae-Young and Yang, Tianyu and Jung, Yei Hwan and Vázquez-Guardado, Abraham and Li, Shupeng and Kim, Jae-Hwan and Shin, Jaeho and Maeng, Woo-Youl and Lee, Geumbee and et al.}, year={2023} } @article{choi_jeong_yin_avila_pfenniger_yoo_lee_tzavelis_lee_chen_et al._2022, title={A transient, closed-loop network of wireless, body-integrated devices for autonomous electrotherapy}, volume={376}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85130974722&partnerID=MN8TOARS}, DOI={10.1126/science.abm1703}, abstractNote={Temporary postoperative cardiac pacing requires devices with percutaneous leads and external wired power and control systems. This hardware introduces risks for infection, limitations on patient mobility, and requirements for surgical extraction procedures. Bioresorbable pacemakers mitigate some of these disadvantages, but they demand pairing with external, wired systems and secondary mechanisms for control. We present a transient closed-loop system that combines a time-synchronized, wireless network of skin-integrated devices with an advanced bioresorbable pacemaker to control cardiac rhythms, track cardiopulmonary status, provide multihaptic feedback, and enable transient operation with minimal patient burden. The result provides a range of autonomous, rate-adaptive cardiac pacing capabilities, as demonstrated in rat, canine, and human heart studies. This work establishes an engineering framework for closed-loop temporary electrotherapy using wirelessly linked, body-integrated bioelectronic devices.}, number={6596}, journal={Science}, author={Choi, Y.S. and Jeong, H. and Yin, R.T. and Avila, R. and Pfenniger, A. and Yoo, J. and Lee, J.Y. and Tzavelis, A. and Lee, Y.J. and Chen, S.W. and et al.}, year={2022}, pages={1006–1012} } @article{jung_yoo_vázquez-guardado_kim_kim_luan_park_lim_shin_su_et al._2022, title={A wireless haptic interface for programmable patterns of touch across large areas of the skin}, volume={5}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85130488693&partnerID=MN8TOARS}, DOI={10.1038/s41928-022-00765-3}, number={6}, journal={Nature Electronics}, author={Jung, Yei Hwan and Yoo, Jae-Young and Vázquez-Guardado, Abraham and Kim, Jae-Hwan and Kim, Jin-Tae and Luan, Haiwen and Park, Minsu and Lim, Jaeman and Shin, Hee-Sup and Su, Chun-Ju and et al.}, year={2022}, pages={374–385} } @article{vázquez-guardado_yang_rogers_2022, title={Challenges and opportunities in flexible, stretchable and morphable bio-interfaced technologies}, volume={9}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85139844091&partnerID=MN8TOARS}, DOI={10.1093/nsr/nwac016}, abstractNote={Living organisms operate on the basis of dynamic biochemical processes elicited by a rich diversity of endogenous and exogenous stimuli. For higher-level forms of life, the result manifests as complex patterns of behavior and ultimately in the form of intelligence and consciousness. Emerging classes of biocompatible electronic interfaces support expanding possibilities in bidirectional communication. Examples include innovative interfaces that provide functional access to the central and peripheral nervous systems, vital organs and muscle tissues, as the basis of control (excitatory or inhibitory electrical stimuli (Fig. 1A-i)) and feedback (electrophysiology recordings (Fig. 1Ai– iii)) mechanisms, linked to implanted or externalized hardware and/or software systems for data collection and analytics. Potential applications inhumans span stimulators for treating neurological disorders or chronic pain, to intraoperative devices for surgical uses or diagnostics. Furthermore, bidirectional interfacing provides opportunities in closed-loop operation for autonomous real-time control of biochemical processes (Fig. 1Aii) relevant for the treatment and diagnosis of diseases or for brain–machine interfaces.}, number={10}, journal={National Science Review}, publisher={Oxford University Press (OUP)}, author={Vázquez-Guardado, Abraham and Yang, Yiyuan and Rogers, John A}, year={2022}, month={Jan} } @article{huang_zhang_arafa_li_vazquez-guardado_ouyang_liu_madhvapathy_song_tzavelis_et al._2022, title={High performance dual-electrolyte magnesium-iodine batteries that can harmlessly resorb in the environment or in the body}, volume={15}, ISSN={["1754-5706"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85138827664&partnerID=MN8TOARS}, DOI={10.1039/d2ee01966c}, abstractNote={High-performance eco- and bio-resorbable magnesium–iodine batteries with >1.8 V output power cardiac pacemakers, wireless environmental monitors, thermal sensors, microcontrollers, and Bluetooth systems.}, number={10}, journal={ENERGY & ENVIRONMENTAL SCIENCE}, author={Huang, Ivy and Zhang, Yamin and Arafa, Hany M. and Li, Shupeng and Vazquez-Guardado, Abraham and Ouyang, Wei and Liu, Fei and Madhvapathy, Surabhi and Song, Joseph Woojin and Tzavelis, Andreas and et al.}, year={2022}, month={Sep} } @article{yang_vázquez-guardado_rogers_2022, title={Implantable LED for Optogenetics}, DOI={10.1007/978-981-16-5505-0_6}, abstractNote={Bio-interfaced technologies that engage with biological organism at fine spatial and temporal resolution provide with means to understand the rich scope of biophysical feedback and control mechanisms that sustain life. Successful outcomes contribute to our understanding of the abstract nature of consciousness, self-awareness, personality traits and other essential characteristics of humans. Optogenetics, a genetic engineering technique that uses light to stimulate cells expressing light-sensitive opsins, provides promising opportunities to control the excitation and inhibition of cellular activities. Bio-interfaced technologies in this context seek to deliver light at cellular-scale resolution to target tissue in free-moving animals. In this chapter, we discuss recent neurotechnologies for optogenetic behavioral studies in the form of externally powered implants and subdermal battery-free devices. Applications not only benefit the understanding of fundamental neuroscience, but also offer exciting routes to implement novel diagnosis and therapeutic tools that have strong impact in human health.}, journal={Series in Display Science and Technology}, publisher={Springer Nature Singapore}, author={Yang, Yiyuan and Vázquez-Guardado, Abraham and Rogers, John A.}, year={2022}, month={Jan}, pages={115–140} } @article{yang_wu_wegener_vázquez-guardado_efimov_lie_wang_ma_banks_li_et al._2022, title={Preparation and use of wireless reprogrammable multilateral optogenetic devices for behavioral neuroscience}, volume={17}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85124936379&partnerID=MN8TOARS}, DOI={10.1038/s41596-021-00672-5}, abstractNote={Wireless battery-free optogenetic devices enable behavioral neuroscience studies in groups of animals with minimal interference to natural behavior. Real-time independent control of optogenetic stimulation through near-field communication dramatically expands the realm of applications of these devices in broad contexts of neuroscience research. Dissemination of these tools with advanced functionalities to the neuroscience community requires protocols for device manufacturing and experimental implementation. This protocol describes detailed procedures for fabrication, encapsulation and implantation of recently developed advanced wireless devices in head- and back-mounted forms. In addition, procedures for standard implementation of experimental systems in mice are provided. This protocol aims to facilitate the application of wireless optogenetic devices in advanced optogenetic experiments involving groups of freely moving rodents and complex environmental designs. The entire protocol lasts ~3-5 weeks.}, number={4}, journal={Nature Protocols}, author={Yang, Yiyuan and Wu, Mingzheng and Wegener, Amy J. and Vázquez-Guardado, Abraham and Efimov, Andrew I. and Lie, Ferrona and Wang, Taoyi and Ma, Yuhang and Banks, Anthony and Li, Zhengwei and et al.}, year={2022}, pages={1073–1096} } @article{guo_bai_ouyang_liu_wu_xu_weng_zang_liu_jacobson_et al._2022, title={Wireless implantable optical probe for continuous monitoring of oxygen saturation in flaps and organ grafts}, volume={13}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85130963916&partnerID=MN8TOARS}, DOI={10.1038/s41467-022-30594-z}, abstractNote={Abstract}, number={1}, journal={Nature Communications}, author={Guo, H. and Bai, W. and Ouyang, W. and Liu, Y. and Wu, C. and Xu, Y. and Weng, Y. and Zang, H. and Liu, Y. and Jacobson, L. and et al.}, year={2022} } @article{wu_wu_vázquez-guardado_kim_zhang_avila_kim_deng_yu_melzer_et al._2022, title={Wireless multi-lateral optofluidic microsystems for real-time programmable optogenetics and photopharmacology}, volume={13}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85138352868&partnerID=MN8TOARS}, DOI={10.1038/s41467-022-32947-0}, abstractNote={Abstract}, number={1}, journal={Nature Communications}, author={Wu, Yixin and Wu, Mingzheng and Vázquez-Guardado, Abraham and Kim, Joohee and Zhang, Xin and Avila, Raudel and Kim, Jin-Tae and Deng, Yujun and Yu, Yongjoon and Melzer, Sarah and et al.}, year={2022} } @article{oh_kim_xie_cho_han_jeon_park_namkoong_avila_song_et al._2021, title={Battery-free, wireless soft sensors for continuous multi-site measurements of pressure and temperature from patients at risk for pressure injuries}, volume={12}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85113413657&partnerID=MN8TOARS}, DOI={10.1038/s41467-021-25324-w}, abstractNote={Abstract}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Oh, Yong Suk and Kim, Jae-Hwan and Xie, Zhaoqian and Cho, Seokjoo and Han, Hyeonseok and Jeon, Sung Woo and Park, Minsu and Namkoong, Myeong and Avila, Raudel and Song, Zhen and et al.}, year={2021}, month={Aug} } @article{zhang_zhao_zhao_xu_franklin_vázquez-guardado_bai_zhao_li_monti_et al._2021, title={Biocompatible Light Guide-Assisted Wearable Devices for Enhanced UV Light Delivery in Deep Skin}, volume={31}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85103416649&partnerID=MN8TOARS}, DOI={10.1002/adfm.202100576}, abstractNote={Abstract}, number={23}, journal={Advanced Functional Materials}, author={Zhang, H. and Zhao, H. and Zhao, X. and Xu, C. and Franklin, D. and Vázquez-Guardado, A. and Bai, W. and Zhao, J. and Li, K. and Monti, G. and et al.}, year={2021} } @article{vázquez-guardado_mehta_jimenez_biswas_ray_baksh_lee_saraf_seal_chanda_2021, title={DNA-Modified Plasmonic Sensor for the Direct Detection of Virus Biomarkers from the Blood}, volume={21}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85115923813&partnerID=MN8TOARS}, DOI={10.1021/acs.nanolett.1c01609}, abstractNote={The rapid spread of viral infections demands early detection strategies to minimize proliferation of the disease. Here, we demonstrate a plasmonic biosensor to detect Dengue virus, which was chosen as a model, via its nonstructural protein NS1 biomarker. The sensor is functionalized with a synthetic single-stranded DNA oligonucleotide and provides high affinity toward NS1 protein present in the virus genome. We demonstrate the detection of NS1 protein at a concentration of 0.1-10 μg/mL in bovine blood using an on-chip microfluidic plasma separator integrated with the plasmonic sensor which covers the clinical threshold of 0.6 μg/mL of high risk of developing Dengue hemorrhagic fever. The conceptual and practical demonstration shows the translation feasibility of these microfluidic optical biosensors for early detection of a wide range of viral infections, providing a rapid clinical diagnosis of infectious diseases directly from minimally processed biological samples at point of care locations.}, number={18}, journal={Nano Letters}, author={Vázquez-Guardado, Abraham and Mehta, Freya and Jimenez, Beatriz and Biswas, Aritra and Ray, Keval and Baksh, Aliyah and Lee, Sang and Saraf, Nileshi and Seal, Sudipta and Chanda, Debashis}, year={2021}, pages={7505–7511} } @article{avila_ciatti_vázquez-guardado_wu_zhang_garziera_rogers_huang_2021, title={Electrochemical Bioelectronics in Drug Delivery: Effect of the Initial Gas Volume}, volume={89}, DOI={10.1115/1.4052883}, abstractNote={Abstract}, number={1}, journal={Journal of Applied Mechanics}, publisher={ASME International}, author={Avila, Raudel and Ciatti, Joanna L. and Vázquez-Guardado, Abraham and Wu, Yixin and Zhang, Yamin and Garziera, Rinaldo and Rogers, John A. and Huang, Yonggang}, year={2021}, month={Nov} } @article{biswas_vázquez-guardado_chanda_2021, title={Superchiral light generation on nanoimprinted achiral plasmonic substrates for chiral drug detection}, DOI={10.1117/12.2584087}, abstractNote={Plasmonic nanostructures provide an excellent platform for label-free detection and manipulation of molecules based on their physical and spectral properties. Our recently discovered superchiral light on achiral plasmonic substrates was used to demonstrate enantioselective chiral molecule detection that are relevant to the pharmaceutical industry. The talk will focus on the detection of chiral drugs and biomolecules using a degenerate cavity-coupled plasmonic substrate. We also discuss advances made regarding the enantioselective separation of chiral molecules using plasmonic tweezers and prospective technical challenges that we aim to address in the future.}, journal={Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XIV}, publisher={SPIE}, author={Biswas, Aritra and Vázquez-Guardado, Abraham and Chanda, Debashis}, editor={Freymann, Georg and Blasco, Eva and Chanda, DebashisEditors}, year={2021}, month={Mar} } @article{park_franz_ryu_luan_cotton_kim_chung_zhao_vazquez-guardado_yang_et al._2021, title={Three-dimensional, multifunctional neural interfaces for cortical spheroids and engineered assembloids}, volume={7}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85102661034&partnerID=MN8TOARS}, DOI={10.1126/sciadv.abf9153}, abstractNote={3D multifunctional frameworks, as flexible as a single strand of silk, modulate and measure neural activity of brain spheroids.}, number={12}, journal={Science Advances}, publisher={American Association for the Advancement of Science (AAAS)}, author={Park, Yoonseok and Franz, Colin K. and Ryu, Hanjun and Luan, Haiwen and Cotton, Kristen Y. and Kim, Jong Uk and Chung, Ted S. and Zhao, Shiwei and Vazquez-Guardado, Abraham and Yang, Da Som and et al.}, year={2021}, month={Mar} } @article{yang_wu_vázquez-guardado_wegener_grajales-reyes_deng_wang_avila_moreno_minkowicz_et al._2021, title={Wireless multilateral devices for optogenetic studies of individual and social behaviors}, volume={24}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85105965648&partnerID=MN8TOARS}, DOI={10.1038/s41593-021-00849-x}, abstractNote={Advanced technologies for controlled delivery of light to targeted locations in biological tissues are essential to neuroscience research that applies optogenetics in animal models. Fully implantable, miniaturized devices with wireless control and power-harvesting strategies offer an appealing set of attributes in this context, particularly for studies that are incompatible with conventional fiber-optic approaches or battery-powered head stages. Limited programmable control and narrow options in illumination profiles constrain the use of existing devices. The results reported here overcome these drawbacks via two platforms, both with real-time user programmability over multiple independent light sources, in head-mounted and back-mounted designs. Engineering studies of the optoelectronic and thermal properties of these systems define their capabilities and key design considerations. Neuroscience applications demonstrate that induction of interbrain neuronal synchrony in the medial prefrontal cortex shapes social interaction within groups of mice, highlighting the power of real-time subject-specific programmability of the wireless optogenetic platforms introduced here.}, number={7}, journal={Nature Neuroscience}, publisher={Springer Science and Business Media LLC}, author={Yang, Yiyuan and Wu, Mingzheng and Vázquez-Guardado, Abraham and Wegener, Amy J. and Grajales-Reyes, Jose G. and Deng, Yujun and Wang, Taoyi and Avila, Raudel and Moreno, Justin A. and Minkowicz, Samuel and et al.}, year={2021}, month={May}, pages={1035–1045} } @article{ausra_wu_zhang_vázquez-guardado_skelton_peralta_avila_murickan_haney_huang_et al._2021, title={Wireless, battery-free, subdermally implantable platforms for transcranial and long-range optogenetics in freely moving animals}, volume={118}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85111081010&partnerID=MN8TOARS}, DOI={10.1073/pnas.2025775118}, abstractNote={Significance}, number={30}, journal={Proceedings of the National Academy of Sciences of the United States of America}, author={Ausra, J. and Wu, M. and Zhang, X. and Vázquez-Guardado, A. and Skelton, P. and Peralta, R. and Avila, R. and Murickan, T. and Haney, C.R. and Huang, Y. and et al.}, year={2021} } @article{lu_bai_zhang_xu_chiarelli_vázquez-guardado_xie_shen_nandoliya_zhao_et al._2021, title={Wireless, implantable catheter-type oximeter designed for cardiac oxygen saturation}, volume={7}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85100953499&partnerID=MN8TOARS}, DOI={10.1126/sciadv.abe0579}, abstractNote={A thin, flexible, wireless oximeter probe monitors venous and cardiac oxygenation levels in a patient-friendly mode.}, number={7}, journal={Science Advances}, publisher={American Association for the Advancement of Science (AAAS)}, author={Lu, Wei and Bai, Wubin and Zhang, Hao and Xu, Chenkai and Chiarelli, Antonio M. and Vázquez-Guardado, Abraham and Xie, Zhaoqian and Shen, Haixu and Nandoliya, Khizar and Zhao, Hangbo and et al.}, year={2021}, month={Feb} } @article{vázquez-guardado_yang_bandodkar_rogers_2020, title={Recent advances in neurotechnologies with broad potential for neuroscience research}, volume={23}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85096055262&partnerID=MN8TOARS}, DOI={10.1038/s41593-020-00739-8}, abstractNote={Interest in deciphering the fundamental mechanisms and processes of the human mind represents a central driving force in modern neuroscience research. Activities in support of this goal rely on advanced methodologies and engineering systems that are capable of interrogating and stimulating neural pathways, from single cells in small networks to interconnections that span the entire brain. Recent research establishes the foundations for a broad range of creative neurotechnologies that enable unique modes of operation in this context. This review focuses on those systems with proven utility in animal model studies and with levels of technical maturity that suggest a potential for broad deployment to the neuroscience community in the relatively near future. We include a brief summary of existing and emerging neuroscience techniques, as background for a primary focus on device technologies that address associated opportunities in electrical, optical and microfluidic neural interfaces, some with multimodal capabilities. Examples of the use of these technologies in recent neuroscience studies illustrate their practical value. The vibrancy of the engineering science associated with these platforms, the interdisciplinary nature of this field of research and its relevance to grand challenges in the treatment of neurological disorders motivate continued growth of this area of study.}, number={12}, journal={Nature Neuroscience}, publisher={Springer Science and Business Media LLC}, author={Vázquez-Guardado, Abraham and Yang, Yiyuan and Bandodkar, Amay J. and Rogers, John A.}, year={2020}, month={Nov}, pages={1522–1536} } @article{choi_hsueh_koo_yang_avila_hu_xie_lee_ning_liu_et al._2020, title={Stretchable, dynamic covalent polymers for soft, long-lived bioresorbable electronic stimulators designed to facilitate neuromuscular regeneration}, volume={11}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85096525977&partnerID=MN8TOARS}, DOI={10.1038/s41467-020-19660-6}, abstractNote={Abstract}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Choi, Yeon Sik and Hsueh, Yuan-Yu and Koo, Jahyun and Yang, Quansan and Avila, Raudel and Hu, Buwei and Xie, Zhaoqian and Lee, Geumbee and Ning, Zheng and Liu, Claire and et al.}, year={2020}, month={Nov} } @article{burton_obaid_vázquez-guardado_schmit_stuart_cai_chen_kandela_haney_waters_et al._2020, title={Wireless, battery-free subdermally implantable photometry systems for chronic recording of neural dynamics}, volume={117}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85079324763&partnerID=MN8TOARS}, DOI={10.1073/pnas.1920073117}, abstractNote={Significance}, number={6}, journal={Proceedings of the National Academy of Sciences of the United States of America}, author={Burton, A. and Obaid, S.N. and Vázquez-Guardado, A. and Schmit, M.B. and Stuart, T. and Cai, L. and Chen, Z. and Kandela, I. and Haney, C.R. and Waters, E.A. and et al.}, year={2020}, pages={2835–2845} } @article{zhang_castro_han_wu_guo_weng_xue_ausra_wang_li_et al._2019, title={Battery-free, lightweight, injectable microsystem for in vivo wireless pharmacology and optogenetics}, volume={116}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85073759453&partnerID=MN8TOARS}, DOI={10.1073/pnas.1909850116}, abstractNote={Significance}, number={43}, journal={Proceedings of the National Academy of Sciences of the United States of America}, author={Zhang, Y. and Castro, D.C. and Han, Y. and Wu, Y. and Guo, H. and Weng, Z. and Xue, Y. and Ausra, J. and Wang, X. and Li, R. and et al.}, year={2019}, pages={21427–21437} } @article{zhao_li_han_zhu_vázquez-guardado_guo_xie_park_chen_wang_et al._2019, title={Buckling and twisting of advanced materials into morphable 3D mesostructures}, volume={116}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85068256683&partnerID=MN8TOARS}, DOI={10.1073/pnas.1901193116}, abstractNote={Significance}, number={27}, journal={Proceedings of the National Academy of Sciences of the United States of America}, author={Zhao, H. and Li, K. and Han, M. and Zhu, F. and Vázquez-Guardado, A. and Guo, P. and Xie, Z. and Park, Y. and Chen, L. and Wang, X. and et al.}, year={2019}, pages={13239–13248} } @article{guardado_flores_lopez-galmiche_alatorre_sánchez-mondragón_2019, title={Detection of Ethanol Concentration using a Generic Optical Sensor Platform}, volume={23}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85069814206&partnerID=MN8TOARS}, DOI={10.13053/CyS-23-1-3138}, abstractNote={In this work we introduce a novel and viable model for the measurement of ethanol concentration in water. The concept relies on the optical high spectral sensitivity of plasmonic devices. The ethanol in water mixture shows a linear ratio with the refractive index and the concentration percentage on a selected range of 0 to 45%. The proposed model is based on the refractive index linear relationships of the ethanol concentration and the plasmonic resonance wavelength. Therefore enabling the indirect measurement of the ethanol concentration through the plasmonic resonance wavelength.}, number={1}, journal={Computacion y Sistemas}, publisher={Instituto Politecnico Nacional/Centro de Investigacion en Computacion}, author={Guardado, Abraham Vázquez and Flores, J. Alfredo Ramirez and Lopez-Galmiche, Gisela and Alatorre, J. Jesús Escobedo and Sánchez-Mondragón, José Javier}, year={2019}, pages={27–31} } @article{vázquez-guardado_barkam_peppler_biswas_dennis_das_seal_chanda_2019, title={Enzyme-Free Plasmonic Biosensor for Direct Detection of Neurotransmitter Dopamine from Whole Blood}, volume={19}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85058880820&partnerID=MN8TOARS}, DOI={10.1021/acs.nanolett.8b04253}, abstractNote={Complex biological fluids without pretreatment, separation, or purification impose stringent limitations on the practical deployment of label-free plasmonic biosensors for advanced assays needed in point of care applications. In this work, we present an enzyme-free plasmonic neurotransmitter dopamine biosensor integrated with a microfluidic plasma separator. This integrated device allows the in-line separation of plasma directly from the bloodstream and channels it to the active detection area, where inorganic cerium oxide nanoparticles function as local selective dopamine binding sites through strong surface redox reaction. A thorough understanding and engineering of the nanoparticles is carried out to maximize its dopamine sensitivity and selectivity. We obtain detection of dopamine at 100 fM concentration in simulated body fluid and 1 nM directly from blood without any prior sample preparation. The detection selectivity is found to be at least five-times higher compared to the common interfering species. This demonstration shows the feasibility of the practical implementation of the proposed plasmonic system in detection of variety of biomarkers directly from the complex biological fluids.}, number={1}, journal={Nano Letters}, author={Vázquez-Guardado, Abraham and Barkam, Swetha and Peppler, Madison and Biswas, Aritra and Dennis, Wessley and Das, Soumen and Seal, Sudipta and Chanda, Debashis}, year={2019}, pages={449–454} } @article{saraf_barkam_peppler_metke_vázquez-guardado_singh_emile_bico_rodas_seal_2019, title={Microsensor for limonin detection: An indicator of citrus greening disease}, volume={283}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85058790658&partnerID=MN8TOARS}, DOI={10.1016/j.snb.2018.12.067}, abstractNote={Limonin is a biomolecule which is responsible for the bitter taste in citrus fruits such as oranges, grapes etc. The abnormally high level of limonin is indicative of citrus greening disease which results in stunted tree growth and affects fruit quality in terms of nutritional value, taste, texture and aroma. Therefore, quantification and detection of limonin is crucial for an early management of citrus greening disease to save the multibillion dollar citrus industry. To this end, an organic electrochemical transistor (OECT) functionalized with Ceria Nanoparticles (CNPs) as transducer has been developed to detect ultralow concentration of limonin. The device exhibited high sensitivity (detection limit: 10 nM) and selectivity towards limonin with response time in seconds. The detection is attributed to the switching of Ce3+ to Ce4+ at the gate electrode which decreases the overall effective gate voltage resulting in an increase in the output current. The increase in output current was observed in transfer characteristics as well as time-current curve. In-situ spectro-electrochemical studies were also performed to analyse the change in oxidation state of CNPs in the presence of limonin. This novel biosensor successfully detected the increase in limonin in infected juice samples as compared to healthy ones with a sensitivity of ∼10 μA/μM. A rapid, easy and on-site testing tool to detect and quantify the amount of limonin for an early detection of citrus greening disease has been demonstrated for the first time.}, journal={Sensors and Actuators, B: Chemical}, author={Saraf, N. and Barkam, S. and Peppler, M. and Metke, A. and Vázquez-Guardado, A. and Singh, S. and Emile, C. and Bico, A. and Rodas, C. and Seal, S.}, year={2019}, pages={724–730} } @article{yu_xie_yu_lee_vazquez-guardado_luan_ruban_ning_akhtar_li_et al._2019, title={Skin-integrated wireless haptic interfaces for virtual and augmented reality}, volume={575}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85075440196&partnerID=MN8TOARS}, DOI={10.1038/s41586-019-1687-0}, abstractNote={Traditional technologies for virtual reality (VR) and augmented reality (AR) create human experiences through visual and auditory stimuli that replicate sensations associated with the physical world. The most widespread VR and AR systems use head-mounted displays, accelerometers and loudspeakers as the basis for three-dimensional, computer-generated environments that can exist in isolation or as overlays on actual scenery. In comparison to the eyes and the ears, the skin is a relatively underexplored sensory interface for VR and AR technology that could, nevertheless, greatly enhance experiences at a qualitative level, with direct relevance in areas such as communications, entertainment and medicine 1,2 . Here we present a wireless, battery-free platform of electronic systems and haptic (that is, touch-based) interfaces capable of softly laminating onto the curved surfaces of the skin to communicate information via spatio-temporally programmable patterns of localized mechanical vibrations. We describe the materials, device structures, power delivery strategies and communication schemes that serve as the foundations for such platforms. The resulting technology creates many opportunities for use where the skin provides an electronically programmable communication and sensory input channel to the body, as demonstrated through applications in social media and personal engagement, prosthetic control and feedback, and gaming and entertainment.}, number={7783}, journal={Nature}, author={Yu, X. and Xie, Z. and Yu, Y. and Lee, J. and Vazquez-Guardado, A. and Luan, H. and Ruban, J. and Ning, X. and Akhtar, A. and Li, D. and et al.}, year={2019}, pages={473–479} } @article{zhang_gutruf_meacham_montana_zhao_chiarelli_vázquez-guardado_norris_lu_guo_et al._2019, title={Wireless, battery-free optoelectronic systems as subdermal implants for local tissue oximetry}, volume={5}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85062998912&partnerID=MN8TOARS}, DOI={10.1126/sciadv.aaw0873}, abstractNote={Wireless, battery-free optoelectronic systems enable localized tissue oximetry in tether-free, awake animal models.}, number={3}, journal={Science Advances}, author={Zhang, H. and Gutruf, P. and Meacham, K. and Montana, M.C. and Zhao, X. and Chiarelli, A.M. and Vázquez-Guardado, A. and Norris, A. and Lu, L. and Guo, Q. and et al.}, year={2019} } @article{lu_yang_meacham_cvetkovic_corbin_vázquez-guardado_xue_yin_boroumand_pakeltis_et al._2018, title={Biodegradable Monocrystalline Silicon Photovoltaic Microcells as Power Supplies for Transient Biomedical Implants}, volume={8}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85042105613&partnerID=MN8TOARS}, DOI={10.1002/aenm.201703035}, abstractNote={Abstract}, number={16}, journal={Advanced Energy Materials}, publisher={Wiley-Blackwell}, author={Lu, Luyao and Yang, Zijian and Meacham, Kathleen and Cvetkovic, Caroline and Corbin, Elise A. and Vázquez-Guardado, Abraham and Xue, Mantian and Yin, Lan and Boroumand, Javaneh and Pakeltis, Grace and et al.}, year={2018}, pages={1703035} } @article{vázquez-guardado_boroumand_franklin_chanda_2018, title={Broadband angle-independent antireflection coatings on nanostructured light trapping solar cells}, volume={2}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85059575558&partnerID=MN8TOARS}, DOI={10.1103/PhysRevMaterials.2.035201}, abstractNote={Backscattering from nanostructured surfaces greatly diminishes the efficacy of light trapping solar cells. While the analytical design of broadband, angle-independent antireflection coatings on nanostructured surfaces proved inefficient, numerical optimization proves a viable alternative. Here, we numerically design and experimentally verify the performance of single and bilayer antireflection coatings on a 2D hexagonal diffractive light trapping pattern on crystalline silicon substrates. Three well-known antireflection coatings, aluminum oxide, silicon nitride, and silicon oxide, which also double as high-quality surface passivation materials, are studied in the 400–1000 nm band. By varying thickness and conformity, the optimal parameters that minimize the broadband total reflectance (specular and scattering) from the nanostructured surface are obtained. The design results in a single-layer antireflection coating with normal-angle wavelength-integrated reflectance below 4% and a bilayer antireflection coating demonstrating reflection down to 1.5%. We show experimentally an angle-averaged reflectance of ∼5.2% up to 60° incident angle from the optimized bilayer antireflection-coated nanostructured surface, paving the path toward practical implementation of the light trapping solar cells.}, number={3}, journal={Physical Review Materials}, publisher={American Physical Society (APS)}, author={Vázquez-Guardado, Abraham and Boroumand, Javaneh and Franklin, Daniel and Chanda, Debashis}, year={2018} } @article{safaei_modak_vázquez-guardado_franklin_chanda_2018, title={Cavity-induced hybrid plasmon excitation for perfect infrared absorption}, volume={43}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85058616469&partnerID=MN8TOARS}, DOI={10.1364/OL.43.006001}, abstractNote={Photonic microcavity coupling of a subwavelength hole-disk array, a two-element metal/dielectric composite structure with enhanced extraordinary transmission, leads to 100% coupling of incident light to the cavity system and subsequent absorption. This light-funneling process arises from the temporal and spatial coupling of the broadband localized surface plasmon resonance on the coupled hole-disk array and the photonic modes of the optical cavity, which induces spectral narrowing of the perfect absorption of light. A simple nanoimprint lithography-based large-area fabrication process paves the path towards practical implementation of plasmonic cavity-based devices and sensors.}, number={24}, journal={Optics Letters}, publisher={The Optical Society}, author={Safaei, Alireza and Modak, Sushrut and Vázquez-Guardado, Abraham and Franklin, Daniel and Chanda, Debashis}, year={2018}, pages={6001–6004} } @article{johnson_ledesma-vázquez_guardado-france_2018, title={Coastal Geomorphology of a Holocene Hurricane Deposit on a Pleistocene Marine Terrace from Isla Carmen (Baja California Sur, Mexico)}, volume={6}, DOI={10.3390/jmse6040108}, abstractNote={This study reports the first example of major erosion from hurricanes degrading a rocky coastline anywhere around the Gulf of California, although other sources of evidence are well known regarding the effect of inland erosion due to catastrophic rainfall in the Southern Cape Region of the Baja California peninsula and farther north. The uplifted, 12-m terrace on the eastern shore of Isla del Carmen is the site of an unconsolidated coastal boulder deposit (CBD) consisting of large limestone blocks and boulders eroded from underlying Pliocene strata. The CBD stretches approximately 1.5 km in length, mostly set back 25 m from the lip of the terrace. The largest blocks of upturned limestone near the terrace edge are estimated to weigh between 5.8 and 28 metric tons. Waves impacting the rocky coast that peeled back slabs of horizontally-layered limestone at this spot are calculated to have been between 11.5 and 14 m in height. Analysis of sampled boulders from the CBD set back from the terrace edge by 25 m suggest that the average wave height responsible for moving those boulders was on the order of 4.3 m. Additional localities with exposed limestone shores, as well as other more common rock types of igneous origin have yet to be surveyed for this phenomenon elsewhere around the Gulf of California.}, number={4}, journal={Journal of Marine Science and Engineering}, publisher={MDPI AG}, author={Johnson, Markes and Ledesma-Vázquez, Jorge and Guardado-France, Rigoberto}, year={2018}, month={Sep}, pages={108} } @article{franklin_modak_vázquez-guardado_safaei_chanda_2018, title={Covert infrared image encoding through imprinted plasmonic cavities}, volume={7}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85056987842&partnerID=MN8TOARS}, DOI={10.1038/s41377-018-0095-9}, abstractNote={Abstract}, number={1}, journal={Light: Science and Applications}, author={Franklin, Daniel and Modak, Sushrut and Vázquez-Guardado, Abraham and Safaei, Alireza and Chanda, Debashis}, year={2018} } @article{zin_mcintosh_bakhshi_vazquez-guardado_kho_fong_stocks_franklin_blakers_2018, title={Erratum to “Polyimide for silicon solar cells with double-sided textured pyramids” [Sol. Energy Mater. Sol. Cells 183 (2018) 200–204] (S0927024818301193) (10.1016/j.solmat.2018.03.015))}, volume={186}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85048755428&partnerID=MN8TOARS}, DOI={10.1016/j.solmat.2018.06.014}, journal={Solar Energy Materials and Solar Cells}, author={Zin, N. and McIntosh, K. and Bakhshi, S. and Vazquez-Guardado, A. and Kho, T. and Fong, K. and Stocks, M. and Franklin, E. and Blakers, A.}, year={2018}, pages={57} } @article{gutruf_krishnamurthi_vázquez-guardado_xie_banks_su_xu_haney_waters_kandela_et al._2018, title={Fully implantable optoelectronic systems for battery-free, multimodal operation in neuroscience research}, volume={1}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85058670118&partnerID=MN8TOARS}, DOI={10.1038/s41928-018-0175-0}, abstractNote={Recently developed ultrasmall, fully implantable devices for optogenetic neuromodulation eliminate the physical tethers associated with conventional set-ups and avoid the bulky head-stages and batteries found in alternative wireless technologies. The resulting systems allow behavioural studies without motion constraints and enable experiments in a range of environments and contexts, such as social interactions. However, these devices are purely passive in their electronic design, thereby precluding any form of active control or programmability; independent operation of multiple devices, or of multiple active components in a single device, is, in particular, impossible. Here we report optoelectronic systems that, through developments in integrated circuit and antenna design, provide low-power operation, and position- and angle-independent wireless power harvesting, with full user-programmability over individual devices and collections of them. Furthermore, these integrated platforms have sizes and weights that are not significantly larger than those of previous, passive systems. Our results qualitatively expand options in output stabilization, intensity control and multimodal operation, with broad potential applications in neuroscience research and, in particular, the precise dissection of neural circuit function during unconstrained behavioural studies. An optoelectronic platform that operates at low power and uses position- and angle-independent wireless power harvesting can provide multimodal programmable control over optogenetic stimulation parameters.}, number={12}, journal={Nature Electronics}, author={Gutruf, Philipp and Krishnamurthi, Vaishnavi and Vázquez-Guardado, Abraham and Xie, Zhaoqian and Banks, Anthony and Su, Chun-Ju and Xu, Yeshou and Haney, Chad R. and Waters, Emily A. and Kandela, Irawati and et al.}, year={2018}, pages={652–660} } @article{safaei_vázquez-guardado_franklin_leuenberger_chanda_2018, title={High-Efficiency Broadband Mid-Infrared Flat Lens}, volume={6}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85049522213&partnerID=MN8TOARS}, DOI={10.1002/adom.201800216}, abstractNote={Abstract}, number={13}, journal={Advanced Optical Materials}, author={Safaei, A. and Vázquez-Guardado, A. and Franklin, D. and Leuenberger, M.N. and Chanda, D.}, year={2018} } @article{safaei_modak_lee_chandra_franklin_vázquez-guardado_chanda_2018, title={Multi-spectral frequency selective mid-infrared microbolometers}, volume={26}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85058141470&partnerID=MN8TOARS}, DOI={10.1364/OE.26.032931}, abstractNote={Frequency selective detection of low energy photons is a scientific challenge using natural materials. A hypothetical surface which functions like a light funnel with very low thermal mass in order to enhance photon collection and suppress background thermal noise is the ideal solution to address both low temperature and frequency selective detection limitations of present detection systems. Here, we present a cavity-coupled quasi-three dimensional plasmonic crystal which induces impedance matching to the free space giving rise to extraordinary transmission through the sub-wavelength aperture array like a "light funnel" in coupling low energy incident photons resulting in frequency selective perfect (~100%) absorption of the incident radiation and zero back reflection. The peak wavelength of absorption of the incident light is almost independent of the angle of incidence and remains within 20% of its maximum (100%) up to θi≤45˚. This perfect absorption results from the incident light-driven localized edge "micro-plasma" currents on the lossy metallic surfaces. The wide-angle light funneling is validated with experimental measurements. Further, a super-lattice based electronic biasing circuit converts the absorbed narrow linewidth (Δλ/λ0< 0.075) photon energy inside the sub-wavelength thick film (< λ/100) to voltage output with high signal to noise ratio close to the theoretical limit. Such artificial plasmonic surfaces enable flexible scaling of light funneling response to any wavelength range by simple dimensional changes paving the path towards room temperature frequency selective low energy photon detection.}, number={25}, journal={Optics Express}, publisher={The Optical Society}, author={Safaei, Alireza and Modak, Sushrut and Lee, Jonathan and Chandra, Sayan and Franklin, Daniel and Vázquez-Guardado, Abraham and Chanda, Debashis}, year={2018}, pages={32931–32940} } @article{zin_mcintosh_bakhshi_vázquez-guardado_kho_fong_stocks_franklin_blakers_2018, title={Polyimide for silicon solar cells with double-sided textured pyramids}, volume={183}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85046649962&partnerID=MN8TOARS}, DOI={10.1016/j.solmat.2018.03.015}, abstractNote={Silicon solar cells incorporating double-sided pyramidal texture are capable of superior light trapping over cells with front-side only texture. However, increased surface area, roughness and exposed <111> crystal planes of textured surfaces not only causes increased recombination, but also makes cells susceptible to shunting through pinholes in the dielectric at the sharp peaks and valleys of the textured pyramids. A polyimide film as an insulating interlayer film is investigated to circumvent the tradeoff between improved light trapping, increased recombination and increased shunt paths. When applied at the rear of the interdigitated back contact silicon solar cell structure, the polyimide film provides an excellent electrical insulation (> 1000 MΩ of insulation resistance) and increases photocurrent (~ 1.1 mA/cm2) owing to an increased rear internal reflectance. The polyimide is also compatible with metal annealing of passivating dielectrics such as silicon nitride. Optical simulation and experimental results are combined in a 3D semiconductor simulation (Quokka) to quantify the possible gain of implementing the double-sided texture in high efficiency silicon solar cells.}, journal={Solar Energy Materials and Solar Cells}, publisher={Elsevier BV}, author={Zin, Ngwe and McIntosh, Keith and Bakhshi, Sara and Vázquez-Guardado, Abraham and Kho, Teng and Fong, Kean and Stocks, Matthew and Franklin, Evan and Blakers, Andrew}, year={2018}, month={Aug}, pages={200–204} } @article{vázquez-guardado_chanda_2018, title={Superchiral Light Generation on Degenerate Achiral Surfaces}, volume={120}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85044777296&partnerID=MN8TOARS}, DOI={10.1103/PhysRevLett.120.137601}, abstractNote={A novel route of superchiral near-field generation is demonstrated based on geometrically achiral systems supporting degenerate and spatially superimposed plasmonic modes. Such systems generate a single-handed chiral near field with simultaneous zero far-field circular dichroism. The phenomenon is theoretically elucidated with a rotating dipole model, which predicts a uniform single-handed chiral near field that flips handedness solely by reversing the handedness of the source. This property allows detection of pure background free molecular chirality through near-field light-matter interaction, which is experimentally demonstrated in the precise identification of both handedness of a chiral molecule on a single substrate with about four orders of magnitude enhancement in detection sensitivity compared to its conventional volumetric counterpart.}, number={13}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Vázquez-Guardado, Abraham and Chanda, Debashis}, year={2018} } @inproceedings{franklin_vázquez-guardado_chanda_2018, title={Superchiral light generation on achiral nanostructured surfaces}, volume={10541}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85049870525&partnerID=MN8TOARS}, DOI={10.1117/12.2290066}, abstractNote={In this work, we demonstrate superchiral light generation based on achiral plasmonic surfaces. At resonance, the symmetric cavity-coupled plasmonic system generates single-sign chiral near-field whose helicity is determined solely by the handedness of the incident light. We elucidate the mechanism for such unique superchiral near field generation and find its origin in coherent and synergetic interactions between plasmonic and photonic cavity modes. The cavity-coupling enhances otherwise weak plasmonic chiral near-field by many folds. Furthermore, the system in a unique way suppresses the far field chirality due to its totally symmetric geometry providing a route for surface-enhanced chiroptic spectroscopy on a single surface.}, booktitle={Proceedings of SPIE - The International Society for Optical Engineering}, publisher={SPIE}, author={Franklin, Daniel and Vázquez-Guardado, Abraham and Chanda, Debashis}, editor={Adibi, Ali and Lin, Shawn-Yu and Scherer, AxelEditors}, year={2018} } @article{lu_gutruf_xia_bhatti_wang_vazquez-guardado_ning_shen_sang_ma_et al._2018, title={Wireless optoelectronic photometers for monitoring neuronal dynamics in the deep brain}, volume={115}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85041958583&partnerID=MN8TOARS}, DOI={10.1073/pnas.1718721115}, abstractNote={Capabilities for recording neural activity in behaving mammals have greatly expanded our understanding of brain function. Some of the most sophisticated approaches use light delivered by an implanted fiber-optic cable to optically excite genetically encoded calcium indicators and to record the resulting changes in fluorescence. Physical constraints induced by the cables and the bulk, size, and weight of the associated fixtures complicate studies on natural behaviors, including social interactions and movements in environments that include obstacles, housings, and other complex features. Here, we introduce a wireless, injectable fluorescence photometer that integrates a miniaturized light source and a photodetector on a flexible, needle-shaped polymer support, suitable for injection into the deep brain at sites of interest. The ultrathin geometry and compliant mechanics of these probes allow minimally invasive implantation and stable chronic operation. In vivo studies in freely moving animals demonstrate that this technology allows high-fidelity recording of calcium fluorescence in the deep brain, with measurement characteristics that match or exceed those associated with fiber photometry systems. The resulting capabilities in optical recordings of neuronal dynamics in untethered, freely moving animals have potential for widespread applications in neuroscience research.}, number={7}, journal={Proceedings of the National Academy of Sciences of the United States of America}, publisher={Proceedings of the National Academy of Sciences}, author={Lu, Luyao and Gutruf, Philipp and Xia, Li and Bhatti, Dionnet L. and Wang, Xinying and Vazquez-Guardado, Abraham and Ning, Xin and Shen, Xinru and Sang, Tian and Ma, Rongxue and et al.}, year={2018}, pages={E1374–E1383} } @article{safaei_chandra_vázquez-guardado_calderon_franklin_tetard_zhai_leuenberger_chanda_2017, title={Dynamically tunable extraordinary light absorption in monolayer graphene}, volume={96}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85038570786&partnerID=MN8TOARS}, DOI={10.1103/PhysRevB.96.165431}, abstractNote={The high carrier mobility of graphene makes it an attractive material for electronics, however, graphene's application for optoelectronic systems is limited due to its low optical absorption. We present a cavity-coupled nanopatterned graphene absorber designed to sustain temporal and spatial overlap between localized surface plasmon resonance and cavity modes, thereby resulting in enhanced absorption up to an unprecedented value of theoretically $(60%)$ and experimentally measured $(45%)$ monolayer graphene in the technologically relevant 8--12-\ensuremath{\mu}m atmospheric transparent infrared imaging band. We demonstrate a wide electrostatic tunability of the absorption band $(\ensuremath{\sim}2\phantom{\rule{0.16em}{0ex}}\ensuremath{\mu}\mathrm{m})$ by modifying the Fermi energy. The proposed device design allows enhanced absorption and dynamic tunability of chemical vapor deposition grown low carrier mobility graphene which provides a significant advantage over previous strategies where absorption enhancement was limited to exfoliated high carrier mobility graphene. We developed an analytical model that incorporates the coupling of the graphene electron and substrate phonons, providing valuable and instructive insights into the modified plasmon-phonon dispersion relation necessary to interpret the experimental observations. Such gate voltage and cavity tunable enhanced absorption in chemical vapor deposited large area monolayer graphene paves the path towards the scalable development of ultrasensitive infrared photodetectors, modulators, and other optoelectronic devices.}, number={16}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Safaei, Alireza and Chandra, Sayan and Vázquez-Guardado, Abraham and Calderon, Jean and Franklin, Daniel and Tetard, Laurene and Zhai, Lei and Leuenberger, Michael N. and Chanda, Debashis}, year={2017} } @article{vázquez-guardado_smith_wilson_ortega_perez_chanda_2016, title={Hybrid cavity-coupled plasmonic biosensors for low concentration, label-free and selective biomolecular detection}, volume={24}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84994689550&partnerID=MN8TOARS}, DOI={10.1364/OE.24.025785}, abstractNote={Simple optical techniques that can accurately and selectively identify organic and inorganic material in a reproducible manner are of paramount importance in biological sensing applications. In this work, we demonstrate that a nanoimprinted plasmonic pattern with locked-in dimensions supports sharp deterministic hybrid resonances when coupled with an optical cavity suitable for high sensitive surface detection. The surface sensing property of this hybrid system is quantified by precise atomic layer growth of aluminum oxide using the atomic layer deposition technique. The analyte specific sensing ability is demonstrated in the detection of two dissimilar analytes, inorganic amine-coated iron oxide nanoparticles and organic streptavidin protein. Femto to nanomolar detection limits were achieved with the proposed coupled plasmonic system based on the versatile and robust soft nanoimprinting technique, which promises practical low cost biosensors.}, number={22}, journal={Optics Express}, publisher={The Optical Society}, author={Vázquez-Guardado, Abraham and Smith, Alexandra and Wilson, Wade and Ortega, Jeanette and Perez, J. Manuel and Chanda, Debashis}, year={2016}, pages={25785–25796} } @article{boroumand_das_vázquez-guardado_franklin_chanda_2016, title={Unified Electromagnetic-Electronic Design of Light Trapping Silicon Solar Cells}, volume={6}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84981263691&partnerID=MN8TOARS}, DOI={10.1038/srep31013}, abstractNote={Abstract}, number={1}, journal={Scientific Reports}, publisher={Springer Nature}, author={Boroumand, Javaneh and Das, Sonali and Vázquez-Guardado, Abraham and Franklin, Daniel and Chanda, Debashis}, year={2016}, month={Aug} } @article{vázquez-guardado_money_mckinney_chanda_2015, title={Multi-spectral infrared spectroscopy for robust plastic identification}, volume={54}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84942374630&partnerID=MN8TOARS}, DOI={10.1364/AO.54.007396}, abstractNote={The identification and classification of plastics plays an important role in waste management and recycling processes. Present electrical and optical sorting techniques lack the required resolution for accurate identification in a high throughput manner for a diverse set of plastics commonly found in municipal waste. In this work a multi-spectral infrared spectroscopic technique is employed to construct a unique fingerprint library of 12 plastic resin groups that are commonly encountered in municipal waste. We test the proposed method in a blind plastic identification experiment, which shows excellent unbiased identification accuracy. This simple optical technique in combination with the multi-spectral library will enable high throughput and accurate detection of various plastics from recovered solid waste.}, number={24}, journal={Applied Optics}, publisher={Optical Society of America (OSA)}, author={Vázquez-Guardado, Abraham and Money, Mason and McKinney, Nathaniel and Chanda, Debashis}, year={2015}, pages={7396–7405} } @article{franklin_chen_vazquez-guardado_modak_boroumand_xu_wu_chanda_2015, title={Polarization-independent actively tunable colour generation on imprinted plasmonic surfaces}, volume={6}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84931281928&partnerID=MN8TOARS}, DOI={10.1038/ncomms8337}, abstractNote={Abstract}, journal={Nature Communications}, publisher={Nature Publishing Group}, author={Franklin, Daniel and Chen, Yuan and Vazquez-Guardado, Abraham and Modak, Sushrut and Boroumand, Javaneh and Xu, Daming and Wu, Shin-Tson and Chanda, Debashis}, year={2015}, pages={7337} } @article{vázquez-guardado_safaei_modak_franklin_chanda_2014, title={Hybrid coupling mechanism in a system supporting high order diffraction, plasmonic, and cavity resonances}, volume={113}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84920084260&partnerID=MN8TOARS}, DOI={10.1103/PhysRevLett.113.263902}, abstractNote={The interactions between plasmonic and photonic modes of a cavity-coupled plasmonic crystal are studied in diffraction and diffractionless regimes, which lead us to the understanding of coherent interactions between electron plasma, higher order cavity, and diffraction modes. The strong interaction between plasmonic and photonic modes is shown to enhance as well as suppress surface plasmon resonance based on cavity phase relation. Numerical and analytical approaches are developed to accurately explain the physics of the interactions evident in their characteristic dispersion graphs. Further experimental measurements confirm the theoretical predictions.}, number={26}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Vázquez-Guardado, Abraham and Safaei, Alireza and Modak, Sushrut and Franklin, Daniel and Chanda, Debashis}, year={2014} } @article{gao_kim_vazquez-guardado_shigeta_hartanto_franklin_progler_bogart_rogers_chanda_2014, title={Materials selections and growth conditions for large-area, multilayered, visible negative index metamaterials formed by nanotransfer printing}, volume={2}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84896884756&partnerID=MN8TOARS}, DOI={10.1002/adom.201300356}, abstractNote={Negative index metamaterials (NIMs) are engineered structures that exhibit negative permeability and permittivity. From early demonstrations in the microwave [ 1,2 ] and terahertz [ 3,4 ] regimes, to more recent work at optical wavelengths, [ 5–9 ] designs have evolved from split-ring and U-shaped resonators to metallic cutwire pairs and dielectric-metal multilayers in open mesh (i.e. fi shnet) layouts. This last geometry represents a multilayered construct that not only allows low loss operation at near infrared (NIR) and visible wavelengths, but is also compatible with large area fabrication strategies based on nanotransfer printing (nTP). [ 10 ] A critical step in this type of fabrication involves collimated physical vapor deposition (PVD) of alternating layers of metals and dielectrics onto substrates with features of relief that defi ne the fi shnet layouts. Detailed mechanisms for fi lm growth depend strongly on materials properties, such as surface mobility, sticking coeffi cient, crystallinity and grain structure [ 11,12 ] and on conditions for deposition, such as rate and base pressure. A behavior of particular relevance here is that the fi lms grow often in a direction that is not entirely perpendicular to the patterned substrate surface (stamp), even for normally incident fl ux of material. As a result, angled sidewall profi les develop at the edges of deposits near features of relief on the substrate. Although such effects can be useful in the fabrication of silicon nanodome arrays, [ 13 ] Spindt-type fi eld emitters, [ 14,15 ] nanocones of metals with sharp tips [ 16 ] and other related structures, they can be detrimental in the fabrication of metamaterials by nTP. For the case of NIMs that consist of multilayer stacks of silver (Ag)/magnesium fl uoride (MgF 2 ) formed by nTP for operation in the NIR, the sidewall slopes are ∼ 6–12° [ 10 ]}, number={3}, journal={Advanced Optical Materials}, publisher={Wiley-Blackwell}, author={Gao, Li and Kim, Youngmin and Vazquez-Guardado, Abraham and Shigeta, Kazuki and Hartanto, Steven and Franklin, Daniel and Progler, Christopher J. and Bogart, Gregory R. and Rogers, John A. and Chanda, Debashis}, year={2014}, pages={256–261} } @article{gao_shigeta_vazquez-guardado_progler_bogart_rogers_chanda_2014, title={Nanoimprinting techniques for large-area three-dimensional negative index metamaterials with operation in the visible and telecom bands}, volume={8}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84903449501&partnerID=MN8TOARS}, DOI={10.1021/nn5015775}, abstractNote={We report advances in materials, designs, and fabrication schemes for large-area negative index metamaterials (NIMs) in multilayer "fishnet" layouts that offer negative index behavior at wavelengths into the visible regime. A simple nanoimprinting scheme capable of implementation using standard, widely available tools followed by a subtractive, physical liftoff step provides an enabling route for the fabrication. Computational analysis of reflection and transmission measurements suggests that the resulting structures offer negative index of refraction that spans both the visible wavelength range (529-720 nm) and the telecommunication band (1.35-1.6 μm). The data reveal that these large (>75 cm(2)) imprinted NIMs have predictable behaviors, good spatial uniformity in properties, and figures of merit as high as 4.3 in the visible range.}, number={6}, journal={ACS Nano}, publisher={American Chemical Society (ACS)}, author={Gao, Li and Shigeta, Kazuki and Vazquez-Guardado, Abraham and Progler, Christopher J. and Bogart, Gregory R. and Rogers, John A. and Chanda, Debashis}, year={2014}, pages={5535–5542} } @inproceedings{lopez-galmiche_vázquez-guardado_antequera_murugka_sanchez-mondragon_2012, title={Analysis of Extrinsic Losses in a Corrugated Photonic Crystal Waveguide}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85136245036&partnerID=MN8TOARS}, DOI={10.1364/laop.2012.lm2a.29}, abstractNote={We analyzed the scattering produced by technological imperfections in a corrugated photonic crystal waveguide. Modeling and losses analysis of the slow-light structures were carried out by plane wave expansion method using the MPB software.}, booktitle={Latin America Optics and Photonics Conference}, publisher={Optical Society of America (OSA)}, author={Lopez-Galmiche, Gisela and Vázquez-Guardado, Abraham and Antequera, David L. Romero and Murugka, Sangeeta and Sanchez-Mondragon, Jose Javier}, year={2012} } @inproceedings{lopez-galmiche_vazquez-guardado_romero-antequera_murugkar_sanchez-mondragon_2012, title={Analysis of Extrinsic Losses in a Corrugated Photonic Crystal Waveguide}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85136245036&partnerID=MN8TOARS}, booktitle={Optics InfoBase Conference Papers}, author={Lopez-Galmiche, G. and Vazquez-Guardado, A. and Romero-Antequera, D.L. and Murugkar, S. and Sanchez-Mondragon}, year={2012} } @inproceedings{vázquez-guardado_lopez-galmiche_leon_sanchez-mondragon_boyd_2012, title={Analysis of Gain Assisted Slow Surface Plasmon-Polaritons in a Symmetrically Cladded Metal Slab Structure}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84893144699&partnerID=MN8TOARS}, DOI={10.1364/fio.2012.ftu3a.58}, abstractNote={We investigate slow surface plasmon-polariton modes supported by a symmetrically cladded metal slab waveguide incorporating optical gain media. We show that the structure can support a group index as large as 800 when losses are compensated}, booktitle={Frontiers in Optics 2012/Laser Science XXVIII}, publisher={Optical Society of America (OSA)}, author={Vázquez-Guardado, Abraham and Lopez-Galmiche, Gisela and Leon, Israel De and Sanchez-Mondragon, Jose J. and Boyd, Robert W.}, year={2012} } @inproceedings{vázquez-guardado_lópez-galmiche_de león_sánchez-mondragón_boyd_2012, title={Analysis of gain assisted slow surface plasmon-polaritons in a symmetrically cladded metal slab structure}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84893144699&partnerID=MN8TOARS}, booktitle={Frontiers in Optics, FIO 2012}, author={Vázquez-Guardado, A. and López-Galmiche, G. and De León, I. and Sánchez-Mondragón, J.J. and Boyd, R.W.}, year={2012} } @inproceedings{vázquez-guardado_lopez-galmiche_leon_sanchez-mondragon_boyd_2012, title={Finite Lorentzian-Like Gain in the Analysis of Gain Assisted Slow Surface Plasmon-Polaritons}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84893043589&partnerID=MN8TOARS}, DOI={10.1364/fio.2012.ftu3a.53}, abstractNote={We investigate slow surface plasmon-polariton in a metal/dielectric interface when a Lorentzian function is used to model the gain response in the dielectric medium. An increase in the well know group index of 1.86 to 10 is achieved.}, booktitle={Frontiers in Optics 2012/Laser Science XXVIII}, publisher={Optical Society of America (OSA)}, author={Vázquez-Guardado, Abraham and Lopez-Galmiche, Gisela and Leon, Israel De and Sanchez-Mondragon, Jose J. and Boyd, Robert W.}, year={2012} } @inproceedings{vázquez-guardado_lópez-galmiche_de león_sánchez-mondragón_boyd_2012, title={Finite Lorentzian-like gain in the analysis of gain assisted slow surface plasmon-polaritons}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84893043589&partnerID=MN8TOARS}, booktitle={Frontiers in Optics, FIO 2012}, author={Vázquez-Guardado, A. and López-Galmiche, G. and De León, I. and Sánchez-Mondragón, J.J. and Boyd, R.W.}, year={2012} } @inproceedings{vázquez-guardado_lopez-galmiche_arizpe_paez-lópez_torres-cisneros_sanchez-mondragon_2012, title={Slow Surface Plasmon-Polaritons in a Metal-Dielectric Structure Incorporating a Lorentzian Gain Medium}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85136270475&partnerID=MN8TOARS}, DOI={10.1364/laop.2012.lm2a.27}, abstractNote={We investigate slow surface plasmons supported at the surface of a semi-infinite metal bound by a gain medium with Lorentzian lineshape and the induced slow light regime due to the active medium.}, booktitle={Latin America Optics and Photonics Conference}, publisher={Optical Society of America (OSA)}, author={Vázquez-Guardado, Abraham and Lopez-Galmiche, Gisela and Arizpe, Israel De Leon and Paez-López, Rafael and Torres-Cisneros, Miguel and Sanchez-Mondragon, Jose Javier}, year={2012} } @inproceedings{cardenas-ortiz_vázquez-guardado_ceballos_lopez-galmiche_may-arrioja_sanchez-mondragon_2012, title={Total internal reflection of photorefractive spatial solitons at a metallic interface}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85088755302&partnerID=MN8TOARS}, DOI={10.1364/fio.2012.fw3a.24}, abstractNote={We study the reflection of spatial solitons with TM polarization at the interface between a photorefractive medium and a metal one. Depending of the incident angle and power, the reflected beam conserves its nondiffracting properties.}, booktitle={Frontiers in Optics, FIO 2012}, publisher={Optical Society of America (OSA)}, author={Cardenas-Ortiz, Gustavo and Vázquez-Guardado, Abraham and Ceballos, Daniel and Lopez-Galmiche, Gisela and May-Arrioja, Daniel A. and Sanchez-Mondragon, Jose J.}, year={2012} } @inproceedings{lozano-crisóstomo_sànchez-mondragón_vázquez-guardado_lópez-galmiche_fuentes-fuentes_magaña-loaiza_escobedo-alatorre_2011, title={An analytical analysis of the nonlinear modes of the coupled silicon-on-insulator waveguides}, volume={8011}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84858397254&partnerID=MN8TOARS}, DOI={10.1117/12.903154}, abstractNote={In the present work we analyze the nonlinear modes of silicon-on-insulator (SOI) nanowires and supermodes of the coupled SOI waveguides. A generalized analysis of the nonlinear modes of silicon nanowires is given where we have considered the scalar approximation and its vectorial nature to obtain the analytical profiles. In the scalar approximation, the analytical analysis of the profiles of the transversal modes is based on the solutions of the Helmholtz equation for nonlinear periodic media, where we obtain an integral solution for the intensity which is identified with the help of the elliptic functions. Those modes are characterized by two constants of motion of particular physical significance and in some approximations the solution could become a soliton or cosenoidal type. Therefore, we describe the solutions on terms of the movement and integration constants. This is an important result because defines the nature of the solutions, therein the analysis of the third order polynomials roots of those elliptic functions. The general theoretical model includes the two-photon absorption (TPA) and the nonlinear Kerr effect implicit in the refraction index.}, booktitle={22nd Congress of the International Commission for Optics: Light for the Development of the World}, publisher={SPIE-Intl Soc Optical Eng}, author={Lozano-Crisóstomo, N. and Sànchez-Mondragón, J. J. and Vázquez-Guardado, A. and López-Galmiche, G. and Fuentes-Fuentes, M. A. and Magaña-Loaiza, O. S. and Escobedo-Alatorre, J.}, editor={Rodríguez-Vera, Ramón and Díaz-Uribe, RufinoEditors}, year={2011}, month={Aug} } @inproceedings{alejo-molina_sánchez-mondragón_escobedo-alatorre_vazquez-guardado_ruiz-pérez_may-arrioja_2011, title={Omnidirectional reflector in a ternary metallo-dielectric structure}, volume={8011}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84858380630&partnerID=MN8TOARS}, DOI={10.1117/12.902270}, abstractNote={We discuss the complex dispersion relation of a one dimensional metallo-dielectric photonic crystal, produced by a dielectric photonic crystal with extremely thin metallic inserts with the same periodicity. We have carried out the analytical and numerical analysis. Also, we show a method to avoid the problem of solving the complicated system of transcendental equations of the dispersion relation that was proposed previously for us and we extended it to the oblique incidence, i.e., for calculating transversal electric and magnetic modes. Moreover, we demonstrated a metallic band gap not only at the bottom but also at high frequencies.}, booktitle={22nd Congress of the International Commission for Optics: Light for the Development of the World}, publisher={SPIE-Intl Soc Optical Eng}, author={Alejo-Molina, A. and Sánchez-Mondragón, J. J. and Escobedo-Alatorre, J. and Vazquez-Guardado, A. and Ruiz-Pérez, V. I. and May-Arrioja, D. A.}, editor={Rodríguez-Vera, Ramón and Díaz-Uribe, RufinoEditors}, year={2011}, month={Aug} } @inproceedings{vázquez-guardado_lópez-galmiche_fuentes-fuentes_ceballos-herrera_may-arrioja_sánchez-mondragón_2011, title={Power-tunable plasmon resonance sensor using Kerr nonlinearity}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84894251698&partnerID=MN8TOARS}, DOI={10.1364/fio.2011.jtua21}, abstractNote={We present the design of a tunable plasmon resonance sensor using a nonlinear Kerr media. Using the power dependence of the nonlinearity, we tune phase matching condition for the plasmon resonance.}, booktitle={Frontiers in Optics 2011/Laser Science XXVII}, publisher={Optical Society of America (OSA)}, author={Vázquez-Guardado, Abraham and López-Galmiche, Gisela and Fuentes-Fuentes, Miguel A. and Ceballos-Herrera, Daniel E. and May-Arrioja, Daniel A. and Sánchez-Mondragón, José J.}, year={2011} } @inproceedings{fuentes-fuentes_lópez-galmiche_vázquez-guardado_alejo-molina_sánchez-mondragón_ferrando_millián_2011, title={Properties of 1D soliton-plasmon interactions}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85085777774&partnerID=MN8TOARS}, DOI={10.1364/fio.2011.jwa42}, abstractNote={We present the modeling of soliton-plasmon interactions at a metal/Kerr interface, we found two kinds of stationary solutions called odd and even modes, and odd modes are more stable than even modes at strong coupling.}, booktitle={Optics InfoBase Conference Papers}, publisher={Optical Society of America (OSA)}, author={Fuentes-Fuentes, Miguel A. and López-Galmiche, Gisela and Vázquez-Guardado, Abraham and Alejo-Molina, Adalberto and Sánchez-Mondragón, José J. and Ferrando, Albert and Millián, Carles}, year={2011} } @inproceedings{properties of 1d soliton-plasmon interactions_2011, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84893594376&partnerID=MN8TOARS}, booktitle={Optics InfoBase Conference Papers}, year={2011} }