Publications

Found 37 results
Author Title Type [ Year(Desc)]
Filters: Author is Speck, James S.  [Clear All Filters]
2013
Zhao, Y., S. Ho Oh, F. Wu, Y. Kawaguchi, S. Tanaka, K. Fujito, J. S. Speck, S. P. DenBaars, and S. Nakamura, "Green semipolar (202̄1̄) InGaN light-emitting diodes with small wavelength shift and narrow spectral linewidth", Applied Physics Express, vol. 6, 6, 2013.
2014
Zhao, Y., F. Wu, T. Jui Yang, Y. Renn Wu, S. Nakamura, and J. S. Speck, "Atomic-scale nanofacet structure in semipolar (202̄1̄) and (202̄1) InGaN single quantum wells", Applied Physics Express, vol. 7, 2, 2014.
2018
Seres, J., E. Seres, C. Serrat, E. C. Young, J. S. Speck, and T. Schumm, All-solid-state VUV frequency comb at 160 nm using multi-harmonic generation in a non-linear femtosecond enhancement cavity, dec, 2018.
2019
Myers, D. J., K. Gel, A. I. Alhassan, L. Martinelli, J. Peretti, S. Nakamura, C. Weisbuch, and J. S. Speck, "Direct measurement of hot-carrier generation in a semiconductor barrier heterostructure: Identification of the dominant mechanism for thermal droop", Phys. Rev. B, vol. 100, pp. 125303, Sep, 2019.
Chmielewski, A., P. Moradifar, L. Miao, K. A. Lopez, Y. Zhang, A. Mauze, J. S. Speck, and N. Alem, "Investigation of the Atomic and Electronic Structure of β-(Al0.2Ga0.8)2O3 Alloys by STEM-EELS", Microscopy and Microanalysis, vol. 25, pp. 2186–2187, 2019.
2020
SaifAddin, B. K., A. S. Almogbel, C. J. Zollner, F. Wu, B. Bonef, M. Iza, S. Nakamura, S. P. DenBaars, and J. S. Speck, "AlGaN Deep-Ultraviolet Light-Emitting Diodes Grown on SiC Substrates", ACS Photonics, 2020.
Lynsky, C., A. I. Alhassan, G. Lheureux, B. Bonef, S. P. DenBaars, S. Nakamura, Y-R. Wu, C. Weisbuch, and J. S. Speck, "Barriers to carrier transport in multiple quantum well nitride-based $c$-plane green light emitting diodes", Phys. Rev. Materials, vol. 4, pp. 054604, May, 2020.
Aleksiejūnas, R., K. Nomeika, O. Kravcov, S. Nargelas, L. Kuritzky, C. Lynsky, S. Nakamura, C. Weisbuch, and J. S. Speck, "Impact of Alloy-Disorder-Induced Localization on Hole Diffusion in Highly Excited c-Plane and m-Plane InGaN Quantum Wells", Phys. Rev. Applied, vol. 14, pp. 054043, Nov, 2020.
Marcinkevičius, S., R. Yapparov, L. Y. Kuritzky, Y-R. Wu, S. Nakamura, and J. S. Speck, "Low-temperature carrier transport across InGaN multiple quantum wells: Evidence of ballistic hole transport", Phys. Rev. B, vol. 101, pp. 075305, Feb, 2020.
Zhang, H., H. Li, P. Li, J. Song, J. S. Speck, S. Nakamura, and S. P. DenBaars, "Room-Temperature Continuous-Wave Electrically Driven Semipolar (202̅1) Blue Laser Diodes Heteroepitaxially Grown on a Sapphire Substrate", ACS Photonics, vol. 7, pp. 1662-1666, 2020.
Poliani, E., D. Seidlitz, M. Ries, S. J. Choi, J. S. Speck, A. Hoffmann, and M. R. Wagner, "Strong Near-Field Light–Matter Interaction in Plasmon-Resonant Tip-Enhanced Raman Scattering in Indium Nitride", The Journal of Physical Chemistry C, vol. 124, pp. 28178-28185, 2020.
2021
Monavarian, M., J. Xu, M. Khoury, F. Wu, P. De Mierry, P. Vennéguès, M. A. Belkin, and J. S. Speck, "Defect Tolerance of Intersubband Transitions in Nonpolar $\mathrmGa\mathrmN/(\mathrmAl,\mathrmGa)\mathrmN$ Heterostructures: A Path toward Low-Cost and Scalable Mid- to Far-Infrared Optoelectronics", Phys. Rev. Appl., vol. 16, pp. 054040, Nov, 2021.
Wong, M. S., N. C. Palmquist, J. Jiang, P. Chan, C. Lee, P. Li, J. Hun Kang, Y. Hyun Baek, C. Hon Kim, D. A. Cohen, et al., "Effects of activation method and temperature to III-nitride micro-light-emitting diodes with tunnel junction contacts grown by metalorganic chemical vapor deposition", Applied Physics Letters, vol. 119, 11, 2021.
Li, P., A. David, H. Li, H. Zhang, C. Lynsky, Y. Yang, M. Iza, J. S. Speck, S. Nakamura, and S. P. DenBaars, "High-temperature electroluminescence properties of InGaN red 40 × 40 μm2 micro-light-emitting diodes with a peak external quantum efficiency of 3.2\%", Applied Physics Letters, vol. 119, 12, 2021.
Mauze, A., Y. Zhang, T. Itoh, T. E. Mates, H. Peelaers, C. G. Van de Walle, and J. S. Speck, "Mg doping and diffusion in (010) β-Ga2O3 films grown by plasma-assisted molecular beam epitaxy", Journal of Applied Physics, vol. 130, 12, 2021.
Shi, J., A. Krishnan, A. F. M. Anha Bhuiyan, Y. Rui Koh, K. Huynh, A. Mauze, S. Mu, B. M. Foley, H. Ahmad, T. Itoh, et al., "Thermal Transport Across Al-(AlxGa1-x)2O3 and Al-Ga2O3 Interfaces", International Electronic Packaging Technical Conference and Exhibition, vol. ASME 2021 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, 10, 2021.
2022
Mauze, A., T. Itoh, Y. Zhang, E. Deagueros, F. Wu, and J. S. Speck, "Coherently strained (001) β-(AlxGa1−x)2O3 thin films on β-Ga2O3: Growth and compositional analysis", Journal of Applied Physics, vol. 132, 09, 2022.
Li, P., H. Li, Y. Yang, H. Zhang, P. Shapturenka, M. Wong, C. Lynsky, M. Iza, M. J. Gordon, J. S. Speck, et al., "Demonstration of ultra-small 5 × 5 μm2 607 nm InGaN amber micro-light-emitting diodes with an external quantum efficiency over 2\%", Applied Physics Letters, vol. 120, 01, 2022.
Ho, C-H., J. S. Speck, C. Weisbuch, and Y-R. Wu, "Efficiency and Forward Voltage of Blue and Green Lateral LEDs with V-shaped Defects and Random Alloy Fluctuation in Quantum Wells", Phys. Rev. Appl., vol. 17, pp. 014033, Jan, 2022.
Lynsky, C., G. Lheureux, B. Bonef, K. Shek Qwah, R. C. White, S. P. DenBaars, S. Nakamura, Y-R. Wu, C. Weisbuch, and J. S. Speck, "Improved Vertical Carrier Transport for Green III-Nitride LEDs Using $(\mathrmIn,\mathrmGa)\mathrmN$ Alloy Quantum Barriers", Phys. Rev. Appl., vol. 17, pp. 054048, May, 2022.
Qwah, K. Shek, E. Farzana, A. Wissel, M. Monavarian, T. Mates, and J. S. Speck, "Indium as a surfactant: Effects on growth morphology and background impurity in GaN films grown by ammonia-assisted molecular beam epitaxy", APL Materials, vol. 10, 08, 2022.
Ewing, J., C. Lynsky, J. Zhang, P. Shapturenka, M. Wong, J. Smith, M. Iza, J. S. Speck, and S. P. DenBaars, "Influence of Superlattice Structure on V-Defect Distribution, External Quantum Efficiency and Electroluminescence for Red InGaN Based µLEDs on Silicon", Crystals, vol. 12, pp. 1216, 2022.
Wong, M. S., P. Chan, N. Lim, H. Zhang, R. C. White, J. S. Speck, S. P. DenBaars, and S. Nakamura, "Low Forward Voltage III-Nitride Red Micro-Light-Emitting Diodes on a Strain Relaxed Template with an InGaN Decomposition Layer", Crystals, vol. 12, pp. 721, 2022.
Farzana, E., A. Bhattacharyya, N. S. Hendricks, T. Itoh, S. Krishnamoorthy, and J. S. Speck, "Oxidized metal Schottky contact with high-κ dielectric field plate for low-loss high-power vertical β-Ga2O3 Schottky diodes", APL Materials, vol. 10, 11, 2022.
Yao, Y., C. J. Zollner, M. Wang, M. Iza, J. S. Speck, S. P. DenBaars, and S. Nakamura, "Polarization-Enhanced p-AlGaN Superlattice Optimization for GUV LED", IEEE Journal of Quantum Electronics, vol. 58, pp. 1-9, 2022.

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