Publications

Found 112 results
Author Title Type [ Year(Asc)]
Filters: First Letter Of Title is D  [Clear All Filters]
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.
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.
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.
Hamdy, S. W., S. P. DenBaars, J. S. Speck, and S. Nakamura, "Designs for III-nitride edge-emitting laser diodes with tunnel junction contacts for low internal optical absorption loss", Optical Engineering, vol. 61, pp. 027102, 2022.
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.
"Disorder effects in nitride semiconductors: impact on fundamental and device properties", Nanophotonics, vol. 10, pp. 3–21, 2021.
2020
Chow, Y. Chao, C. Lee, M. S. Wong, Y-R. Wu, S. Nakamura, S. P. DenBaars, J. E. Bowers, and J. S. Speck, "Dependence of carrier escape lifetimes on quantum barrier thickness in InGaN/GaN multiple quantum well photodetectors", Opt. Express, vol. 28, pp. 23796–23805, Aug, 2020.
Li, H., H. Zhang, P. Li, M. S. Wong, Y. Chao Chow, S. Pinna, J. Klamkin, P. DeMierry, J. S. Speck, S. Nakamura, et al., "Development of efficient semipolar InGaN long wavelength light-emitting diodes and blue laser diodes grown on a high quality semipolar GaN/sapphire template", Journal of Physics: Photonics, vol. 2, pp. 031003, jun, 2020.
2019
Khoury, M., H. Li, H. Zhang, B. Bonef, M. S. Wong, F. Wu, D. Cohen, P. De Mierry, P. Vennéguès, J. S. Speck, et al., "Demonstration of Electrically Injected Semipolar Laser Diodes Grown on Low-Cost and Scalable Sapphire Substrates", ACS Applied Materials & Interfaces, vol. 11, pp. 47106-47111, 2019.
Hilfiker, M., U. Kilic, A. Mock, V. Darakchieva, S. Knight, R. Korlacki, A. Mauze, Y. Zhang, J. Speck, and M. Schubert, "Dielectric function tensor (1.5 eV to 9.0 eV), anisotropy, and band to band transitions of monoclinic β-(AlxGa1–x)2O3 (x ≤ 0.21) films", Applied Physics Letters, vol. 114, pp. 231901, 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.
2018
Farzana, E., E. Ahmadi, J. S. Speck, A. R. Arehart, and S. A. Ringel, "Deep level defects in Ge-doped (010) β-Ga2O3 layers grown by plasma-assisted molecular beam epitaxy", Journal of Applied Physics, vol. 123, no. 16: AIP Publishing, pp. 161410, 2018.
Alhassan, A. I., N. G. Young, R. M. Farrell, C. Pynn, F. Wu, A. Y. Alyamani, S. Nakamura, S. P. DenBaars, and J. S. Speck, "Development of high performance green c-plane III-nitride light-emitting diodes", Optics express, vol. 26, no. 5: Optical Society of America, pp. 5591–5601, 2018.
Saifaddin, B., C. J. Zollner, A. Almogbel, H. Foronda, F. Wu, A. Albadri, A. Al Yamani, M. Iza, S. Nakamura, S. P. DenBaars, et al., "Developments in AlGaN and UV-C LEDs grown on SiC", Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXII, vol. 10554: International Society for Optics and Photonics, pp. 105541E, 2018.
Neal, A. T., S. Mou, S. Rafique, H. Zhao, E. Ahmadi, J. S. Speck, K. T. Stevens, J. D. Blevins, D. B. Thomson, N. Moser, et al., "Donors and deep acceptors in β-Ga2O3", Applied Physics Letters, vol. 113, pp. 062101, 2018.
2017
Ahmadi, E., O. S. Koksaldi, X. Zheng, T. Mates, Y. Oshima, U. K. Mishra, and J. S. Speck, "Demonstration of β-(Al x Ga1- x) 2O3/β-Ga2O3 modulation doped field-effect transistors with Ge as dopant grown via plasma-assisted molecular beam epitaxy", Applied Physics Express, vol. 10, no. 7: IOP Publishing, pp. 071101, 2017.
Mensi, M., R. Ivanov, T. K. Uz?davinys, K. M. Kelchner, S. Nakamura, S. P. DenBaars, J. S. Speck, and S. Marcinkevic?ius, "Direct measurement of nanoscale lateral carrier diffusion: toward scanning diffusion microscopy", ACS Photonics: American Chemical Society, 2017.
2016
Jiang, R., X. Shen, J. Chen, GX. Duan, EX. Zhang, DM. Fleetwood, RD. Schrimpf, SW. Kaun, ECH. Kyle, JS. Speck, et al., "Degradation and annealing effects caused by oxygen in AlGaN/GaN high electron mobility transistors", Applied Physics Letters, vol. 109, no. 2: AIP Publishing, pp. 023511, 2016.
Yonkee, B. P., E. C. Young, C. Lee, J. T. Leonard, S. P. DenBaars, J. S. Speck, and S. Nakamura, "Demonstration of a III-nitride edge-emitting laser diode utilizing a GaN tunnel junction contact", Optics express, vol. 24, no. 7: Optical Society of America, pp. 7816–7822, 2016.
Kowsz, S. J., C. D. Pynn, F. Wu, R. M. Farrell, J. S. Speck, S. P. DenBaars, and S. Nakamura, "Designing optically pumped InGaN quantum wells with long wavelength emission for a phosphor-free device with polarized white-light emission", Gallium Nitride Materials and Devices XI, vol. 9748: International Society for Optics and Photonics, pp. 97481Z, 2016.
Hwang, D., B. Yonkee, R. M. Farrell, S. Nakamura, J. S. Speck, and S. P. DenBaars, "Development of c-plane thin-film flip-chip LEDs fabricated by photoelectrochemical (PEC) liftoff", Compound Semiconductor Week (CSW)[Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS), 2016: IEEE, pp. 1–1, 2016.
Speck, J., "Development of β-Ga2O3 Materials", Meeting Abstracts, no. 24: The Electrochemical Society, pp. 1244–1244, 2016.
Romanov, AE., and JS. Speck, "Dislocations in LD and LED semiconductor heterostructures", Laser Optics (LO), 2016 International Conference: IEEE, pp. R3–11, 2016.

Pages