Works (51)

2019 | journal article

Quasi-phase-matched second harmonic generation of UV light using AlN waveguides

APPLIED PHYSICS LETTERS, 114(10).

By: D. Alden, T. Troha, R. Kirste, S. Mita, Q. Guo, A. Hoffmann, M. Zgonik, R. Collazo, Z. Sitar

Source: Web Of Science
Added: April 2, 2019

2019 | journal article

Structural characteristics of m-plane AlN substrates and homoepitaxial films

JOURNAL OF CRYSTAL GROWTH, 507, 389–394.

By: M. Graziano, I. Bryan, Z. Bryan, R. Kirste, J. Tweedie, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: January 28, 2019

2019 | article

The polarization field in Al-rich AlGaN multiple quantum wells

JAPANESE JOURNAL OF APPLIED PHYSICS.

Source: Web Of Science
Added: July 29, 2019

2019 | journal article

The role of transient surface morphology on composition control in AlGaN layers and wells

APPLIED PHYSICS LETTERS, 114(3).

Source: NC State University Libraries
Added: February 11, 2019

2018 | journal article

A thermodynamic supersaturation model for the growth of aluminum gallium nitride by metalorganic chemical vapor deposition

JOURNAL OF APPLIED PHYSICS, 124(11).

Source: NC State University Libraries
Added: October 16, 2018

2018 | journal article

Bulk and Surface Electronic Properties of Inorganic Materials: Tools to Guide Cellular Behavior

SMALL METHODS, 2(9).

By: P. Snyder, P. Reddy, R. Kirste, R. Collazo & A. Ivanisevic

Source: NC State University Libraries
Added: October 16, 2018

2018 | journal article

Structure of ultrathin native oxides on III-nitride surfaces

ACS Applied Materials & Interfaces, 10(13), 10607–10611.

Source: NC State University Libraries
Added: August 6, 2018

2018 | journal article

Thermal conductivity of GaN single crystals: Influence of impurities incorporated in different growth processes

JOURNAL OF APPLIED PHYSICS, 124(10).

By: R. Rounds, B. Sarkar, T. Sochacki, M. Bockowski, M. Imanishi, Y. Mori, R. Kirste, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: October 16, 2018

2018 | journal article

Thermal conductivity of single-crystalline AIN

Applied Physics Express, 11(7).

By: R. Rounds, B. Sarkar, A. Klump, C. Hartmann, T. Nagashima, R. Kirste, A. Franke, M. Bickermann ...

Source: NC State University Libraries
Added: August 6, 2018

2018 | journal article

Variably doped nanostructured gallium nitride surfaces can serve as biointerfaces for neurotypic PC12 cells and alter their behavior

RSC ADVANCES, 8(64), 36722–36730.

By: P. Snyder, P. Reddy, R. Kirste, D. LaJeunesse, R. Collazo & A. Ivanisevic

Source: NC State University Libraries
Added: November 26, 2018

2018 | journal article

The influence of point defects on the thermal conductivity of AlN crystals

Journal of Applied Physics, 123(18).

By: R. Rounds, B. Sarkar, D. Alden, Q. Guo, A. Klump, C. Hartmann, T. Nagashima, R. Kirste ...

Source: NC State University Libraries
Added: August 6, 2018

2017 | journal article

Defect quasi Fermi level control-based C-N reduction in GaN: Evidence for the role of minority carriers

Applied Physics Letters, 111(15).

Source: NC State University Libraries
Added: August 6, 2018

2017 | journal article

High free carrier concentration in p-GaN grown on AlN substrates

Applied Physics Letters, 111(3).

By: B. Sarkar, S. Mita, P. Reddy, A. Klump, F. Kaess, J. Tweedie, I. Bryan, Z. Bryan ...

Source: NC State University Libraries
Added: August 6, 2018

2017 | conference paper

Material considerations for the development of III-nitride power devices

In Gallium nitride and silicon carbide power technologies 7 (Vol. 80, pp. 29–36).

By: B. Sarkar, P. Reddy, F. Kaess, B. Haidet, J. Tweedie, S. Mita, R. Kirste, E. Kohn, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2017 | journal article

Performance improvement of ohmic contacts on Al-rich n-AlGaN grown on single crystal AlN substrate using reactive ion etching surface treatment

Applied Physics Express, 10(7).

Source: NC State University Libraries
Added: August 6, 2018

2017 | journal article

Persistent photoconductivity, nanoscale topography, and chemical functionalization can collectively influence the behavior of PC12 cells on wide bandgap semiconductor surfaces

Small (Weinheim An Der Bergstrasse, Germany), 13(24).

By: P. Snyder, R. Kirste, R. Collazo & A. Ivanisevic

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Atomically thin MoS2 narrowband and broadband light superabsorbers

ACS Nano, 10(8), 7493–7499.

By: L. Huang, G. Li, A. Gurarslan, Y. Yu, R. Kirste, W. Guo, J. Zhao, R. Collazo ...

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

HgNO3 sensitivity of AlGaN/GaN field effect transistors functionalized with phytochelating peptides

AIP Advances, 6(6).

By: N. Rohrbaugh, L. Hernandez-Balderrama, F. Kaess, R. Kirste, R. Collazo & A. Ivanisevic

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Nanoscale topography, semiconductor polarity and surface functionalization: Additive and cooperative effects on PC12 cell behavior

RSC Advances, 6(100), 97873–97881.

By: P. Snyder, R. Kirste, R. Collazoa & A. Ivanisevic

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Neurotypic cell attachment and growth on III-nitride lateral polarity structures

Materials Science & Engineering. C, Biomimetic Materials, Sensors and Systems, 58, 1194–1198.

By: L. Bain, R. Kirste, C. Johnson, H. Ghashghaei, R. Collazo & A. Ivanisevic

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Photoluminescence changes of III-Nitride lateral polarity structures after chemical functionalization

Materials Research Express, 3(12).

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Polarity control in group-III nitrides beyond pragmatism

Physical Review Applied, 5(5).

By: S. Mohn, N. Stolyarchuk, T. Markurt, R. Kirste, M. Hoffmann, R. Collazo, A. Courville, R. Di Felice ...

Source: NC State University Libraries
Added: August 6, 2018

2016 | conference paper

Strain engineered high reflectivity DBRs in the deep UV

In Gallium nitride materials and devices xi (Vol. 9748).

By: A. Franke, P. Hoffmann, L. Hernandez-Balderrama, F. Kaess, I. Bryan, S. Washiyama, M. Bobea, J. Tweedie ...

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Charge neutrality levels, barrier heights, and band offsets at polar AlGaN

Applied Physics Letters, 107(9).

By: P. Reddy, I. Bryan, Z. Bryan, J. Tweedie, S. Washiyama, R. Kirste, S. Mita, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Electronic biosensors based on III-nitride semiconductors

Annual Review of Analytical Chemistry, Vol 8, 8, 149–169.

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Growth and characterization of AlxGa1-xN lateral polarity structures

Physica Status Solidi. A, Applications and Materials Science, 212(5), 1039–1042.

By: M. Hoffmann, R. Kirste, S. Mita, W. Guo, J. Tweedie, M. Bobea, I. Bryan, Z. Bryan ...

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

KOH based selective wet chemical etching of AlN, AlxGa1-xN, and GaN crystals: A way towards substrate removal in deep ultraviolet-light emitting diode

Applied Physics Letters, 106(8).

By: W. Guo, R. Kirste, I. Bryan, Z. Bryan, L. Hussey, P. Reddy, J. Tweedie, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Optical characterization of Al- and N-polar AlN waveguides for integrated optics

Applied Physics Express, 8(4).

By: M. Rigler, J. Buh, M. Hoffmann, R. Kirste, M. Bobea, S. Mita, M. Gerhold, R. Collazo, Z. Sitar, M. Zgonik

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Optical properties of aluminum nitride single crystals in the THz region

Optical Materials Express, 5(10), 2106–2111.

By: A. Majkic, U. Puc, A. Franke, R. Kirste, R. Collazo, Z. Sitar, M. Zgonik

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Exciton transitions and oxygen as a donor in m-plane AlN homoepitaxial films

Journal of Applied Physics, 115(13).

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Fermi level control of compensating point defects during metalorganic chemical vapor deposition growth of Si-doped AlGaN

Applied Physics Letters, 105(22).

By: Z. Bryan, I. Bryan, B. Gaddy, P. Reddy, L. Hussey, M. Bobea, W. Guo, M. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Homoepitaxial AlN thin films deposited on m-plane (1(1)over-bar00) AlN substrates by metalorganic chemical vapor deposition

Journal of Applied Physics, 116(13).

Source: NC State University Libraries
Added: August 6, 2018

2014 | conference paper

Properties of AlN based lateral polarity structures

In Physica status solidi c: current topics in solid state physics, vol 11, no 2 (Vol. 11, pp. 261–264).

By: R. Kirste, S. Mita, M. Hoffmann, L. Hussey, W. Guo, I. Bryan, Z. Bryan, J. Tweedie ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Sapphire decomposition and inversion domains in N-polar aluminum nitride

Applied Physics Letters, 104(3).

By: L. Hussey, R. White, R. Kirste, S. Mita, I. Bryan, W. Guo, K. Osterman, B. Haidet ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Schottky contact formation on polar and non-polar AlN

Journal of Applied Physics, 116(19).

By: P. Reddy, I. Bryan, Z. Bryan, J. Tweedie, R. Kirste, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Stimulated emission and optical gain in AlGaN heterostructures grown on bulk AlN substrates

Journal of Applied Physics, 115(10).

By: W. Guo, Z. Bryan, J. Xie, R. Kirste, S. Mita, I. Bryan, L. Hussey, M. Bobea ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | conference paper

Surface preparation of non-polar single-crystalline AlN substrates

In Physica status solidi c: current topics in solid state physics, vol 11, no 3-4 (Vol. 11, pp. 454–457).

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

The role of the carbon-silicon complex in eliminating deep ultraviolet absorption in AlN

Applied Physics Letters, 104(20).

By: B. Gaddy, Z. Bryan, I. Bryan, J. Xie, R. Dalmau, B. Moody, Y. Kumagai, T. Nagashima ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Compensation effects in GaN: Mg probed by Raman spectroscopy and photoluminescence measurements

Journal of Applied Physics, 113(10).

By: R. Kirste, M. Hoffmann, J. Tweedie, Z. Bryan, G. Callsen, T. Kure, C. Nenstiel, M. Wagner ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Effects of strain on the valence band structure and exciton-polariton energies in ZnO

Physical Review. B, Condensed Matter and Materials Physics, 88(23).

By: M. Wagner, G. Callsen, J. Reparaz, R. Kirste, A. Hoffmann, A. Rodina, A. Schleife, F. Bechstedt, . Phillips, M. R.

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Fermi level control of point defects during growth of Mg-doped GaN

Journal of Electronic Materials, 42(5), 815–819.

By: Z. Bryan, M. Hoffmann, J. Tweedie, R. Kirste, G. Callsen, I. Bryan, A. Rice, M. Bobea ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Ge doped GaN with controllable high carrier concentration for plasmonic applications

Applied Physics Letters, 103(24).

By: R. Kirste, M. Hoffmann, E. Sachet, M. Bobea, Z. Bryan, I. Bryan, C. Nenstiel, A. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Lasing and longitudinal cavity modes in photo-pumped deep ultraviolet AlGaN heterostructures

Applied Physics Letters, 102(17).

By: J. Xie, S. Mita, Z. Bryan, W. Guo, L. Hussey, B. Moody, R. Schlesser, R. Kirste ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Refractive index of III-metal-polar and N-polar AlGaN waveguides grown by metal organic chemical vapor deposition

Applied Physics Letters, 102(22).

By: M. Rigler, M. Zgonik, M. Hoffmann, R. Kirste, M. Bobea, R. Collazo, Z. Sitar, S. Mita, M. Gerhold

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Strain relaxation by pitting in AlN thin films deposited by metalorganic chemical vapor deposition

Applied Physics Letters, 102(6).

By: I. Bryan, A. Rice, L. Hussey, Z. Bryan, M. Bobea, S. Mita, J. Xie, R. Kirste, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Vacancy compensation and related donor-acceptor pair recombination in bulk AlN

Applied Physics Letters, 103(16).

By: B. Gaddy, Z. Bryan, I. Bryan, R. Kirste, J. Xie, R. Dalmau, B. Moody, Y. Kumagai ...

Source: NC State University Libraries
Added: August 6, 2018

2012 | journal article

On the origin of the 265 nm absorption band in AlN bulk crystals

Applied Physics Letters, 100(19).

By: R. Collazo, J. Xie, B. Gaddy, Z. Bryan, R. Kirste, M. Hoffmann, R. Dalmau, B. Moody ...

Source: NC State University Libraries
Added: August 6, 2018

2012 | journal article

Optical signature of Mg-doped GaN: Transfer processes

Physical Review. B, Condensed Matter and Materials Physics, 86(7).

By: G. Callsen, M. Wagner, T. Kure, J. Reparaz, M. Bugler, J. Brunnmeier, C. Nenstiel, A. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

| conference paper

Fabrication and characterization of lateral polar GaN structures for second harmonic generation

Hoffmann, M. P., Gerhold, M., Kirste, R., Rice, A., Akouala, C. R., Xie, J. Q. Q., … Sitar, Z. In Quantum sensing and nanophotonic devices x (Vol. 8631).

Source: NC State University Libraries
Added: August 6, 2018

| journal article

Nanostructure surface patterning of GaN thin films and application to AlGaN/AlN multiple quantum wells: A way towards light extraction efficiency enhancement of III-nitride based light emitting diodes

Guo, W., Kirste, R., Bryan, Z., Bryan, I., Gerhold, M., Collazo, R., & Sitar, Z. Journal of Applied Physics, 117(11).

By: W. Guo, R. Kirste, Z. Bryan, I. Bryan, M. Gerhold, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

| conference paper

Point defect management in GaN by Fermi-level control during growth

Hoffmann, M. P., Tweedie, J., Kirste, R., Bryan, Z., Bryan, I., Gerhold, M., … Collazo, R. In Gallium nitride materials and devices ix (Vol. 8986).

By: M. Hoffmann, J. Tweedie, R. Kirste, Z. Bryan, I. Bryan, M. Gerhold, Z. Sitar, R. Collazo

Source: NC State University Libraries
Added: August 6, 2018