Publications

Found 112 results
Author Title Type [ Year(Asc)]
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2012
Craven, M. D., S. P. DenBaars, J. S. Speck, and S. Nakamura, Dislocation reduction in non-polar iii-nitride thin films, 2012.
Jewell, J., D. Simeonov, S-C. Huang, Y-L. Hu, S. Nakamura, J. Speck, and C. Weisbuch, "Double embedded photonic crystals for extraction of guided light in light-emitting diodes", Applied Physics Letters, vol. 100, no. 17: AIP, pp. 171105, 2012.
2011
Zhang, Z., C. Hurni, A. Arehart, J. Speck, and S. Ringel, "Deep Traps in M-Plane GaN Grown by Ammonia MBE", Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States.[np]. Jun: Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States, 2011.
Imer, B. M., J. S. Speck, and S. P. DenBaars, Defect reduction of non-polar and semi-polar III-nitrides with sidewall lateral epitaxial overgrowth (SLEO), 2011.
Huang, C-Y., M. T. Hardy, K. Fujito, D. F. Feezell, J. S. Speck, S. P. DenBaars, and S. Nakamura, "Demonstration of 505 nm laser diodes using wavelength-stable semipolar (20 21) InGaN/GaN quantum wells", Applied Physics Letters, vol. 99, no. 24: AIP, pp. 241115, 2011.
Bierwagen, O., J. S. Speck, T. Nagata, T. Chikyow, Y. Yamashita, H. Yoshikawa, and K. Kobayashi, "Depletion of the In 2 O 3 (001) and (111) surface electron accumulation by an oxygen plasma surface treatment", Applied Physics Letters, vol. 98, no. 17: AIP, pp. 172101, 2011.
Young, E. C., A. E. Romanov, and J. S. Speck, "Determination of Composition and Lattice Relaxation in Semipolar Ternary (In, Al, Ga) N Strained Layers from Symmetric X-ray Diffraction Measurements", Applied physics express, vol. 4, no. 6: IOP Publishing, pp. 061001, 2011.
Farrell, RM., DA. Haeger, PS. Hsu, K. Fujito, DF. Feezell, SP. DenBaars, JS. Speck, and S. Nakamura, "Determination of internal parameters for AlGaN-cladding-free m-plane InGaN/GaN laser diodes", Applied Physics Letters, vol. 99, no. 17: AIP, pp. 171115, 2011.
Kaun, S. W., M. Hoi Wong, S. Dasgupta, S. Choi, R. Chung, U. K. Mishra, and J. S. Speck, "Device physics-024101 Effects of Threading Dislocation Density on the Gate Leakage of AlGaN/GaN Heterostructures for High Electron Mobility Transistors", Applied Physics Express, vol. 4, no. 2, 2011.
Sasikumar, A., A. Arehart, S. Kaun, M. Hoi Wong, J. Speck, U. Mishra, and S. Ringe, "Direct Correlation between EC-0. 57 eV Trap Generation and Field-Induced Degradation in AlGaN/GaN High Electron Mobility Transistors", Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States.[np]. Jun: Minerals, Metals and Materials Society/AIME, 420 Commonwealth Dr., P. O. Box 430 Warrendale PA 15086 United States, 2011.
Rangel, E., E. Matioli, Y-S. Choi, C. Weisbuch, J. S. Speck, and E. L. Hu, "Directionality control through selective excitation of low-order guided modes in thin-film InGaN photonic crystal light-emitting diodes", Applied physics letters, vol. 98, no. 8: AIP, pp. 081104, 2011.
2009
Shen, H., M. Wraback, H. Zhong, A. Tyagi, SP. DenBaars, S. Nakamura, and JS. Speck, "Determination of polarization field in a semipolar (11 2\= 2) In Ga/ Ga N single quantum well using Franz–Keldysh oscillations in electroreflectance", Applied Physics Letters, vol. 94, no. 24: AIP, pp. 241906, 2009.
Bierwagen, O., T. Nagata, T. Ive, CG. Van de Walle, and JS. Speck, "Dissipation-factor-based criterion for the validity of carrier-type identification by capacitance-voltage measurements", Applied Physics Letters, vol. 94, no. 15: AIP, pp. 152110, 2009.
2008
Arehart, AR., A. Corrion, C. Poblenz, JS. Speck, UK. Mishra, and SA. Ringel, "Deep level optical and thermal spectroscopy of traps in n-GaN grown by ammonia molecular beam epitaxy", Applied Physics Letters, vol. 93, no. 11: AIP, pp. 112101, 2008.
Imer, B. M., J. S. Speck, and S. P. DenBaars, Defect reduction of non-polar and semi-polar III-Nitrides with sidewall lateral epitaxial overgrowth (SLEO), 2008.
Asamizu, H., M. Saito, K. Fujito, J. S. Speck, S. P. DenBaars, and S. Nakamura, "Demonstration of 426 nm InGaN/GaN laser diodes fabricated on free-standing semipolar (1122) gallium nitride substrates", Applied physics express, vol. 1, no. 9: IOP Publishing, pp. 091102, 2008.
Speck, J. S., Development of Advanced Ill-Nitride Materials: DTIC Document, 2008.
Speck, J. S., Development of III-Nitride Materials for IR Applications: DTIC Document, 2008.
Hol\`y, V., T. Baumbach, D. Lübbert, L. Helfen, M. Ellyan, P. Mikulík, S. Keller, SP. DenBaars, and J. Speck, "Diffuse x-ray scattering from statistically inhomogeneous distributions of threading dislocations beyond the ergodic hypothesis", Physical Review B, vol. 77, no. 9: American Physical Society, pp. 094102, 2008.
McGroddy, K., A. David, E. Matioli, M. Iza, S. Nakamura, S. DenBaars, JS. Speck, C. Weisbuch, and EL. Hu, "Directional emission control and increased light extraction in GaN photonic crystal light emitting diodes", Applied physics letters, vol. 93, no. 10: AIP, pp. 103502, 2008.
Koblmüller, G., R. Chu, F. Wu, U. K. Mishra, and J. S. Speck, "Dislocation reduction in AlGaN/GaN heterostructures on 4H-SiC by molecular beam epitaxy in the thermal decomposition regime", Applied physics express, vol. 1, no. 6: IOP Publishing, pp. 061103, 2008.
2007
Shen, L., Y. Pei, L. McCarthy, C. Poblenz, A. Corrion, N. Fichtenbaum, S. Keller, SP. DenBaars, JS. Speck, and UK. Mishra, "Deep-recessed GaN HEMTs using selective etch technology exhibiting high microwave performance without surface passivation", Microwave Symposium, 2007. IEEE/MTT-S International: IEEE, pp. 623–626, 2007.
Hirai, A., BA. Haskell, MB. McLaurin, F. Wu, MC. Schmidt, KC. Kim, TJ. Baker, SP. DenBaars, S. Nakamura, and JS. Speck, "Defect-mediated surface morphology of nonpolar m-plane GaN", Applied physics letters, vol. 90, no. 12: AIP, pp. 121119, 2007.
Getty, A. R. K., A. David, Y. Wu, C. Weisbuch, and J. S. Speck, "Demonstration of distributed Bragg Reflectors for deep ultraviolet applications", Japanese Journal of Applied Physics, vol. 46, no. 8L: IOP Publishing, pp. L767, 2007.
Zhong, H., A. Tyagi, NN. Fellows, RB. Chung, M. Saito, K. Fujito, JS. Speck, SP. DenBaars, and S. Nakamura, "Demonstration of high power blue-green light emitting diode on semipolar (1122) bulk GaN substrate", Electronics Letters, vol. 43, no. 15: IET Digital Library, pp. 825–827, 2007.

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