Publications

Found 647 results
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2009
Newman, S. A., D. S. Kamber, T. J. Baker, Y. Wu, F. Wu, Z. Chen, S. Namakura, J. S. Speck, and S. P. DenBaars, "Lateral epitaxial overgrowth of (0001) AlN on patterned sapphire using hydride vapor phase epitaxy", Applied Physics Letters, vol. 94, no. 12: AIP, pp. 121906, 2009.
Sato, H., R. B. Chung, F. Wu, J. S. Speck, S. P. DenBaars, and S. Nakamura, MOCVD GROWTH TECHNIQUE FOR PLANAR SEMIPOLAR (Al, In, Ga, B) N BASED LIGHT EMITTING DIODES, 2009.
Bierwagen, O., M. E. White, M-Y. Tsai, T. Nagata, and J. S. Speck, "Non-alloyed Schottky and ohmic contacts to as-grown and oxygen-plasma treated n-type SnO2 (110) and (101) thin films", Applied Physics Express, vol. 2, no. 10: IOP Publishing, pp. 106502, 2009.
Kelchner, K. M., Y-. Da Lin, M. T. Hardy, C. Yen Huang, P. Shan Hsu, R. M. Farrell, D. A. Haeger, H. Chih Kuo, F. Wu, K. Fujito, et al., "Nonpolar AlGaN-cladding-free blue laser diodes with InGaN waveguiding", Applied physics express, vol. 2, no. 7: IOP Publishing, pp. 071003, 2009.
Tyagi, A., F. Wu, E. C. Young, A. Chakraborty, H. Ohta, R. Bhat, K. Fujito, S. P. DenBaars, S. Nakamura, and J. S. Speck, "Partial strain relaxation via misfit dislocation generation at heterointerfaces in (Al, In) GaN epitaxial layers grown on semipolar (11 2\= 2) GaN free standing substrates", Applied Physics Letters, vol. 95, no. 25: AIP, pp. 251905, 2009.
Shen, P. H., G. Garrett, M. Wraback, H. Zhong, A. Tyagi, J. Speck, and S. Nakamura, "Piezoelectric Field in Semi-Polar InGaN/GaN Quantum Wells", Meeting Abstracts, no. 21: The Electrochemical Society, pp. 885–885, 2009.
Bierwagen, O., M. E. White, M-Y. Tsai, and J. S. Speck, "Plasma-assisted molecular beam epitaxy of high quality In 2 O 3 (001) thin films on Y-Stabilized ZrO 2 (001) using in as an auto surfactant", Applied Physics Letters, vol. 95, no. 26: AIP, pp. 262105, 2009.
Masui, H., D. S. Kamber, S. E. Brinkley, F. Wu, T. J. Baker, H. Zhong, M. Iza, J. S. Speck, S. Nakamura, and S. P. DenBaars, "Spontaneous formation of ${$1 1Ø 0 1$}$ InGaN quantum wells on a (1 1 2Ø 2) GaN template and their electroluminescence characteristics", Semiconductor Science and Technology, vol. 25, no. 1: IOP Publishing, pp. 015003, 2009.
Metcalfe, G. D., H. Shen, M. Wraback, G. Koblmüller, C. S. Gallinat, and J. S. Speck, "Terahertz emission from nonpolar indium nitride", Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference. CLEO/QELS 2009. Conference on: IEEE, pp. 1–2, 2009.
Miller, N., J. Ager, R. Jones, H. Smith, K. Man Yu, E. Haller, W. Walukiewicz, W. Schaff, C. Gallinat, G. Koblmüller, et al., "Thermopower of n-and p-type InN", APS Meeting Abstracts, 2009.
Shen, H., M. Wraback, H. Zhong, A. Tyagi, SP. DenBaars, S. Nakamura, and JS. Speck, "Unambiguous evidence of the existence of polarization field crossover in a semipolar InGaN/GaN single quantum well", Applied Physics Letters, vol. 95, no. 3: AIP, pp. 033503, 2009.
Uedono, A., S. Ishibashi, S. Keller, C. Moe, P. Cantu, TM. Katona, DS. Kamber, Y. Wu, E. Letts, SA. Newman, et al., "Vacancy-oxygen complexes and their optical properties in AlN epitaxial films studied by positron annihilation", Journal of Applied Physics, vol. 105, no. 5: AIP, pp. 054501, 2009.
2008
Hashimoto, T., F. Wu, J. S. Speck, and S. Nakamura, "Ammonothermal growth of bulk GaN", Journal of Crystal Growth, vol. 310, no. 17: Elsevier, pp. 3907–3910, 2008.
McLaurin, M. B., A. Hirai, E. Young, F. Wu, and J. S. Speck, "Basal plane stacking-fault related anisotropy in X-ray rocking curve widths of m-plane GaN", Japanese Journal of Applied Physics, vol. 47, no. 7R: IOP Publishing, pp. 5429, 2008.
Kim, K. Choong, M. C. Schmidt, F. Wu, A. Hirai, M. B. McLaurin, S. P. DenBaars, S. Nakamura, and J. S. Speck, CRYSTAL GROWTH OF M-PLANE AND SEMIPOLAR PLANES OF (Al, In, Ga, B) N ON VARIOUS SUBSTRATES, 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.
Metcalfe, G. D., H. Shen, M. Wraback, A. Hirai, F. Wu, and J. S. Speck, "Enhanced terahertz radiation from high stacking fault density nonpolar GaN", Applied Physics Letters, vol. 92, no. 24: AIP, pp. 241106, 2008.
Metcalfe, G. D., H. Shen, M. Wraback, A. Hirai, F. Wu, and J. S. Speck, "Enhanced terahertz radiation from high stacking fault density nonpolar GaN", Applied Physics Letters, vol. 92, no. 24: AIP, pp. 241106, 2008.
Brown, D. F., S. Keller, F. Wu, J. S. Speck, S. P. DenBaars, and U. K. Mishra, "Growth and characterization of N-polar GaN films on SiC by metal organic chemical vapor deposition", Journal of Applied Physics, vol. 104, no. 2: AIP, pp. 024301, 2008.
Weisbuch, C. C. A., J. S. Speck, and S. P. DenBaars, High efficiency white, single or multi-color light emitting diodes (leds) by index matching structures, may # " 29", 2008.
Weisbuch, C. C. A., A. J. F. David, J. S. Speck, and S. P. DenBaars, Horizontal emitting, vertical emitting, beam shaped, distributed feedback (DFB) lasers by growth over a patterned substrate, 2008.
Chu, R., C. Poblenz, M. Hoi Wong, S. Dasgupta, S. Rajan, Y. Pei, F. Recht, L. Shen, J. S. Speck, and U. K. Mishra, "Improved Performance of Plasma-Assisted Molecular Beam Epitaxy Grown AlGaN/GaN High Electron Mobility Transistors with Gate-Recess and CF4-Treatment", Applied physics express, vol. 1, no. 6: IOP Publishing, pp. 061101, 2008.
Imer, B., M. Schmidt, B. Haskell, S. Rajan, B. Zhong, K. Kim, F. Wu, T. Mates, S. Keller, U. K. Mishra, et al., "Improved quality nonpolar a-plane GaN/AlGaN UV LEDs grown with sidewall lateral epitaxial overgrowth (SLEO)", physica status solidi (a), vol. 205, no. 7: WILEY-VCH Verlag, pp. 1705–1712, 2008.
Wraback, M., G. D. Chern, E. D. Readinger, P. H. Shen, G. Koblmüller, C. Gallinat, and J. S. Speck, "Indium Nitride: A New Material for High Efficiency, Compact, 1550nm Laser-Based Terahertz Sources in Chemical and Biological Detection", International Journal of High Speed Electronics and Systems, vol. 18, no. 01: World Scientific, pp. 3–9, 2008.

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