@article{roy_awartani_sen_o'connor_kudenov_2015, title={Complete Intrinsic Coincident Polarimetry using Stacked Organic Photovoltaics}, volume={9613}, ISSN={["0277-786X"]}, DOI={10.1117/12.2188972}, abstractNote={Measuring the 2 dimensional Stokes vector, to determine the polarization state of light, finds application in multiple areas, including the characterization of aerosol size distributions, target identification, quality control by evaluating the distribution of stress birefringence, resolving data channels in telecommunications, and for evaluating biological tissues in medical imaging. Conventional methods, such as channeled and division of focal plane polarimeters, usually limit spatial resolution, while others, like division of aperture or division of amplitude polarimeters, have higher complexity and less compactness. To help solve these issues, we have developed a system that uses semitransparent organic photovoltaics (OPVs) as photodetectors. The active area of the devices consist of biaxially oriented polymer films, which enables the device to preferentially absorb certain polarized states of incident light, depending on the orientation of the polymer chains. Taking advantage of the cells’ transparency and ease of processing, compared to inorganic materials, enables multiple devices to be “stacked” along the optical axis. Presently, experiments have been conducted to detect linear polarization states of light. We use three stacked OPVs, where each device can measure one of the first three Stokes parameters simultaneously, thereby ensuring high spatial and temporal resolution with inherent spatial registration. In this paper, the fabrication of the OPVs and the design and calibration technique is documented, along with experimental data, supporting the hypothesis.}, journal={POLARIZATION SCIENCE AND REMOTE SENSING VII}, author={Roy, S. Gupta and Awartani, O. M. and Sen, P. and O'Connor, B. T. and Kudenov, M. W.}, year={2015} }
 @article{ciani_sen_batra_2004, title={Initial growth of Ba on Si(001)}, volume={69}, number={24}, journal={Physical Review. B, Condensed Matter and Materials Physics}, author={Ciani, A. J. and Sen, P. and Batra, I. P.}, year={2004} }
 @article{sen_mitas_2003, title={Electronic structure and ground states of transition metals encapsulated in a Si-12 hexagonal prism cage}, volume={68}, ISSN={["2469-9969"]}, DOI={10.1103/physrevb.68.155404}, abstractNote={We report on a computational study of the electronic structure of recently discovered clusters with an encapsulated transition metal (TM) atom in a ${\mathrm{Si}}_{12}$ hexagonal prism cage. The cage geometry is remarkably stable regardless of the type of doping TM atom from $3d,4d,$ and $5d$ series. We predict and quantify the stability for several other TM dopings besides the experimentally observed ones. The multiplicity of the ground states can be ``tuned'' between singlets and triplets by varying the type of TM atom (even number of electrons), while they are doublets for odd number of electrons. We also explore the possibility of forming solids with hexagonal structure from selected clusters.}, number={15}, journal={PHYSICAL REVIEW B}, author={Sen, P and Mitas, L}, year={2003}, month={Oct} }