Publications

Found 632 results
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2024
Yapparov, R., T. Tak, J. Ewing, F. Wu, S. Nakamura, S. P. DenBaars, J. S. Speck, and S. Marcinkevičius, "Carrier Diffusion in long wavelength InGaN quantum well LEDs after injection through V-defects", Applied Physics Letters, vol. 125, issue 3, 07/2024.
Hendricks, N. S., A. E. Islam, E. A. Sowers, J. Williams, D. M. Dryden, K. J. Liddy, W. Wang, J. S. Speck, and A. J. Green, "Current transport mechanisms of metal/TiO2/Beta-Ga2O3 diodes", Journal of Applied Physics, vol. 135, issue 9, 2024.
Hendricks, N. S., A. E. Islam, E. A. Sowers, J. Williams, D. M. Dryden, K. J. Liddy, W. Wang, J. S. Speck, and A. J. Green, "Current transport mechanisms of metal/TiO2/Beta-Ga2O3 diodes", Journal of Applied Physics, vol. 135, issue 9, 2024.
Quevedo, A., F. Wu, T-Y. Tsai, J. J. Ewing, T. Tak, S. Gandrothula, S. Gee, X. Li, S. Nakamura, S. P. DenBaars, et al., "Dislocation half-loop control for optimal V-defect density in GaN-based light emitting diodes", Applied Physics Letters, vol. 125, issue 4, 07/2024.
Marcinkevičius, S., T. Tak, Y. Chao Chow, F. Wu, R. Yapparov, S. P. DenBaars, S. Nakamura, and J. S. Speck, "Dynamics of carrier injection through V-defects in long wavelength GaN LEDs", Applied Physics Letters, vol. 124, issue 18, 04/2024.
Wong, M. S., E. S. Trageser, H. Zhang, H-M. Chang, S. Gee, T. Tak, S. Gandrothula, C. Lee, J. S. Speck, S. Nakamura, et al., "III-nitride m-plane violet narrow ridge edge-emitting laser diodes with sidewall passivation using atomic layer deposition", Optics Express, vol. 32, issue 12, 06/2024.
Fornos, C., N. Alyabyeva, M. Sauty, W. Ying Ho, Y. Chao Chow, T. Tak, J. S. Speck, C. Weisbuch, Y. Lassailly, A. C. H. Rowe, et al., "Nanoscale mapping of inhomogeneities in the luminescence of operational nitride LEDs", Gallium Nitride Materials and Devices XIX, pp. PC1288608, 03/2024.
Wong, M. S., S. Gee, T. Tak, S. Gandrothula, S. Rebollo, NG. Cha, J. S. Speck, and S. P. DenBaars, "Optical Analysis of III-nitride micro-light-emitting diodes with different sidewall treatments at low current density operation", Japanese Journal of Applied Physics, vol. 63, issue 4, 04/2024.
Tak, T., A. Quevedo, F. Wu, S. Gandrothula, J. J. Ewing, S. Gee, S. Nakamura, S. P. DenBaars, and J. S. Speck, "Planarization of p-GaN surfaces on MOCVD grown V-defect engineered GaN-based LEDs", Applied Physics Letters, vol. 124, issue 17, 04/2024.
Ewing, J. J., F. Wu, A. Quevedo, T. Tak, S. Nakamura, S. P. DenBaars, and J. S. Speck, "Pure edge-dislocation half-loops in low-temperature GaN for V-defect formation", Physical Review Applied, vol. 21, issue 6, 06/2024.
2023
Wang, M., F. Wu, Y. Yao, C. Zollner, M. Iza, M. Lam, S. P. DenBaars, S. Nakamura, and J. S. Speck, "10.6% external quantum efficiency germicidal UV-LEDs grown on thin highly conductive n-AlGaN", Applied Physics Letters, vol. 123, issue 23, 2023.
Wang, M., F. Wu, Y. Yao, C. Zollner, M. Iza, M. Lam, S. P. DenBaars, S. Nakamura, and J. S. Speck, "10.6% external quantum efficiency germicidal UV-LEDs grown on thin highly conductive n-AlGaN", Applied Physics Letters, vol. 123, issue 23, 2023.
Ewing, J., C. Lynsky, F. Wu, M. Wong, M. Iza, J. S. Speck, and S. P. DenBaars, "6.5% external quantum efficiency in V-defect engineered red InGaN LEDs", Gallium Nitride Materials and Devices XVIII: International Society for Optics and Photonics, 2023.
Ewing, J., C. Lynsky, F. Wu, M. Wong, M. Iza, J. S. Speck, and S. P. DenBaars, "6.5% external quantum efficiency in V-defect engineered red InGaN LEDs", Gallium Nitride Materials and Devices XVIII: International Society for Optics and Photonics, 2023.
Ho, W. Ying, Y. Chao Chow, Z. Biegler, K. Shek Qwah, T. Tak, A. Wissel-Garcia, I. Liu, F. Wu, S. Nakamura, and J. S. Speck, "Atomic layer etching (ALE) of III-nitrides", Applied Physics Letters, vol. 123, issue 6, 2023.
Ho, W. Ying, Y. Chao Chow, Z. Biegler, K. Shek Qwah, T. Tak, A. Wissel-Garcia, I. Liu, F. Wu, S. Nakamura, and J. S. Speck, "Atomic layer etching (ALE) of III-nitrides", Applied Physics Letters, vol. 123, issue 6, 2023.
Tsai, T-Y., K. Shek Qwah, J-P. Banon, M. Filoche, C. Weisbuch, Y-R. Wu, and J. S. Speck, "Carrier localization in III-nitride versus conventional III-V semiconductors: A study on the effects of alloy disorder using landscape theory and the Schrodinger equation", Physical Review Applied, vol. 20, issue 4, 2023.
Tsai, T-Y., K. Shek Qwah, J-P. Banon, M. Filoche, C. Weisbuch, Y-R. Wu, and J. S. Speck, "Carrier localization in III-nitride versus conventional III-V semiconductors: A study on the effects of alloy disorder using landscape theory and the Schrodinger equation", Physical Review Applied, vol. 20, issue 4, 2023.
Ho, W. Ying, A. I. Alhassan, C. Lynsky, Y. Chao Chow, D. J. Myers, S. P. DenBaars, S. Nakamura, J. Peretti, C. Weisbuch, and J. S. Speck, "Detection of hot electrons originating from an upper valley at 1.7 eV above the Γ valley in wurtzite GaN using electron emission spectroscopy", Phys. Rev. B, vol. 107, pp. 035303, Jan, 2023.
Mickevičius, J., E. Valkiūnaitė, Ž. Podlipskas, K. Nomeika, S. Nargelas, G. Tamulaitis, Y.C. Chow, S. Nakamura, J.S. Speck, C. Weisbuch, et al., "Dynamics of double-peak photoluminescence in m-plane InGaN/GaN MQWs", Journal of Luminescence, vol. 257, pp. 119732, 2023.
Marcinkevičius, S., J. Ewing, R. Yapparov, F. Wu, S. Nakamura, and J. S. Speck, "Experimental evidence of hole injection through V-defects in long wavelength GaN-based LEDs", Applied Physics Letters, vol. 123, issue 20, 2023.
Hamwey, R., N. Hatui, E. Akso, F. Wu, C. Clymore, S. Keller, J. S. Speck, and U. K. Mishra, "First Demonstration of an N-Polar InAlGaN/GaN HEMT", IEEE Electron Device Letters, vol. 45, issue 3, pp. 328-331, 2023.
Wang, M., S. Mu, J. S. Speck, and C. G. Van de Walle, "First-Principles Study of Twin Boundaries and Stacking Faults in Beta-Ga2O3", Advanced Materials Interfaces, 2023.
Ewing, J. J., C. Lynsky, M. S. Wong, F. Wu, Y. Chao Chow, P. Shapturenka, M. Iza, S. Nakamura, S. P. DenBaars, and J. S. Speck, "High external quantum efficiency (6.5%) InGaN V-defect LEDs to 600 nm and patterned sapphire substrates", Optics Express, vol. 31, issue 25, pp. 41351-41360, 2023.
Ewing, J. J., C. Lynsky, M. S. Wong, F. Wu, Y. Chao Chow, P. Shapturenka, M. Iza, S. Nakamura, S. P. DenBaars, and J. S. Speck, "High external quantum efficiency (6.5%) InGaN V-defect LEDs to 600 nm and patterned sapphire substrates", Optics Express, vol. 31, issue 25, pp. 41351-41360, 2023.

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