Publications

Found 1602 results
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2013
Connelly, B., N. Woodward, G. D. Metcalfe, L. E. Rodak, N. C. Das, M. Reed, A. V. Sampath, H. Shen, M. Wraback, R. M. Farrell, et al., "Temperature-dependent carrier transport in a p-GaN/i-InGaN/n-GaN solar cell heterostructure using ultrafast spectroscopy", CLEO: Science and Innovations: Optical Society of America, pp. CTh1M–7, 2013.
Metcalfe, G. D., A. Hirai, E. C. Young, J. S. Speck, H. Shen, and M. Wraback, "Terahertz studies of carrier localization in spontaneously forming polar lateral heterostructures", physica status solidi (RRL)-Rapid Research Letters, vol. 7, no. 11: Wiley Online Library, pp. 993–996, 2013.
Pfaff, N. A., K. M. Kelchner, D. F. Feezell, S. Nakamura, S. P. DenBaars, and J. S. Speck, "Thermal Performance of Violet and Blue Single-Quantum-Well Nonpolar m-Plane InGaN Light-Emitting Diodes", Applied Physics Express, vol. 6, no. 9: IOP Publishing, pp. 092104, 2013.
Hardy, M. T., F. Wu, P. Shan Hsu, D. A. Haeger, S. Nakamura, J. S. Speck, and S. P. DenBaars, "True green semipolar InGaN-based laser diodes beyond critical thickness limits using limited area epitaxy", Journal of Applied Physics, vol. 114, no. 18: AIP, pp. 183101, 2013.
Pimputkar, S., P. M. Von Dollen, J. S. Speck, and S. Nakamura, Use of alkaline-earth metals to reduce impurity incorporation into a group-iii nitride crystal grown using the ammonothermal method, apr # " 25", 2013.
Pimputkar, S., D. S. Kamber, J. S. Speck, and S. Nakamura, Using boron-containing compounds, gasses and fluids during ammonothermal growth of group-III nitride crystals, 2013.
Pimputkar, S., D. S. Kamber, J. S. Speck, and S. Nakamura, Using boron-containing compounds, gasses and fluids during ammonothermal growth of group-iii nitride crystals, 2013.
2012
Haeger, D. A., E. C. Young, R. B. Chung, F. Wu, N. A. Pfaff, M. Tsai, K. Fujito, S. P. DenBaars, J. S. Speck, S. Nakamura, et al., "384 nm laser diode grown on a (20 2\= 1) semipolar relaxed AlGaN buffer layer", Applied Physics Letters, vol. 100, no. 16: AIP, pp. 161107, 2012.
Haeger, D., E. Young, R. Chung, F. Wu, S. Nakamura, S. DenBaars, J. S. Speck, A. Romanov, and D. A. Cohen, "384nm AlGaN Diode Lasers on Relaxed Semipolar Buffers", CLEO: Science and Innovations: Optical Society of America, pp. CTu2N–4, 2012.
Hsu, P. Shan, M. T. Hardy, F. Wu, I. Koslow, E. C. Young, A. E. Romanov, K. Fujito, D. F. Feezell, S. P. DenBaars, J. S. Speck, et al., "444.9 nm semipolar (11 2\= 2) laser diode grown on an intentionally stress relaxed InGaN waveguiding layer", Applied Physics Letters, vol. 100, no. 2: AIP, pp. 021104, 2012.
Sasikumar, A., A. Arehart, S. Kolluri, MH. Wong, S. Keller, SP. DenBaars, JS. Speck, UK. Mishra, and SA. Ringel, "Access-region defect spectroscopy of DC-stressed N-polar GaN MIS-HEMTs", IEEE Electron Device Letters, vol. 33, no. 5: IEEE, pp. 658–660, 2012.
DenBaars, SP., C-C. Pan, N. Pfaff, S. Tanaka, JS. Speck, and S. Nakamura, "Advances in GaN semiconductors for energy efficient solid state lighting", Photonics Conference (IPC), 2012 IEEE: IEEE, pp. 427–428, 2012.
Feezell, D. F., M. C. Schmidt, K-C. Kim, R. M. Farrell, D. A. Cohen, J. S. Speck, S. P. DenBaars, and S. Nakamura, Al (x) Ga (1-x) N-cladding-free nonpolar III-nitride based laser diodes and light emitting diodes, 2012.
Raman, A., C. A. Hurni, J. S. Speck, and U. K. Mishra, "AlGaN/GaN heterojunction bipolar transistors by ammonia molecular beam epitaxy", physica status solidi (a), vol. 209, no. 1: Wiley Online Library, pp. 216–220, 2012.
Wu, Y-R., R. Shivaraman, K-C. Wang, and J. S. Speck, "Analyzing the physical properties of InGaN multiple quantum well light emitting diodes from nano scale structure", Applied Physics Letters, vol. 101, no. 8: AIP, pp. 083505, 2012.
Wong, M. Hoi, U. Singisetti, J. Lu, J. S. Speck, and U. K. Mishra, "Anomalous output conductance in N-polar GaN high electron mobility transistors", IEEE Transactions on Electron Devices, vol. 59, no. 11: IEEE, pp. 2988–2995, 2012.
Das, NC., ML. Reed, AV. Sampath, H. Shen, M. Wraback, RM. Farrell, M. Iza, SC. Cruz, , NG. Young, et al., "Anti Reflection (AR) Coating for Indium Gallium Nitride (InGaN) Solar Cells", Army Research Laboratory Report, 08/2012.
Henry, T. A., A. Armstrong, K. M. Kelchner, S. Nakamura, SP. DenBaars, and JS. Speck, "Assessment of deep level defects in m-plane GaN grown by metalorganic chemical vapor deposition", Applied Physics Letters, vol. 100, no. 8: AIP, pp. 082103, 2012.
Mazumder, B., MH. Wong, CA. Hurni, JY. Zhang, UK. Mishra, and JS. Speck, "Asymmetric interfacial abruptness in N-polar and Ga-polar GaN/AlN/GaN heterostructures", Applied Physics Letters, vol. 101, no. 9: AIP, pp. 091601, 2012.
Choi, P-P., O. Cojocaru-Mirédin, D. Abou-Ras, R. Caballero, D. Raabe, V. S. Smentkowski, C. Gyung Park, G. Ho Gu, B. Mazumder, M. Hoi Wong, et al., "Atom probe tomography of compound semiconductors for photovoltaic and light-emitting device applications", Microscopy Today, vol. 20, no. 3: Cambridge University Press, pp. 18–24, 2012.
Hu, Y-L., S. Krämer, P. T. Fini, and J. S. Speck, "Atomic structure of prismatic stacking faults in nonpolar a-plane GaN epitaxial layers", Applied Physics Letters, vol. 101, no. 11: AIP, pp. 112102, 2012.
Hu, Y-L., S. Krämer, P. T. Fini, and J. S. Speck, "Atomic structure of prismatic stacking faults in nonpolar a-plane GaN epitaxial layers", Applied Physics Letters, vol. 101, pp. 112102, 2012.
Hurni, C. A., H. Kroemer, U. K. Mishra, and J. S. Speck, "Capacitance-voltage profiling on polar III-nitride heterostructures", Journal of Applied Physics, vol. 112, no. 8: AIP, pp. 083704, 2012.
Garrett, G. A., P. Rotella, H. Shen, M. Wraback, D. A. Haeger, R. B. Chung, N. Pfaff, E. C. Young, S. P. DenBaars, J. S. Speck, et al., "Carrier dynamics in active regions for ultraviolet optoelectronics grown on thick, relaxed AlGaN on semipolar bulk GaN", physica status solidi (b), vol. 249, no. 3: Wiley Online Library, pp. 507–510, 2012.
Lang, J. R., NG. Young, R. M. Farrell, Y-R. Wu, and JS. Speck, "Carrier escape mechanism dependence on barrier thickness and temperature in InGaN quantum well solar cells", Applied Physics Letters, vol. 101, no. 18: AIP, pp. 181105, 2012.

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