Publications

Found 161 results
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2010
White, M. E., O. Bierwagen, M-Y. Tsai, and J. S. Speck, "Synthesis and characterization of highly resistive epitaxial indium-doped SnO2", Applied physics express, vol. 3, no. 5: IOP Publishing, pp. 051101, 2010.
2011
Dasgupta, S., DF. Brown, JS. Speck, UK. Mishra, and others, "Scaling behavior and velocity enhancement in self-aligned N-polar GaN/AlGaN HEMTs with maximum fT of 163 GHz", Device Research Conference (DRC), 2011 69th Annual: IEEE, pp. 141–142, 2011.
Dasgupta, S., D. F. Brown, U. Singisetti, S. Keller, J. S. Speck, U. K. Mishra, and others, "Self-aligned technology for N-polar GaN/Al (Ga) N MIS-HEMTs", IEEE Electron Device Letters, vol. 32, no. 1: IEEE, pp. 33–35, 2011.
Young, E. C., A. E. Romanov, and J. S. Speck, "Semiconductors, dielectrics, and organic materials-061001 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, 2011.
Chung, R. B., O. Bierwagen, F. Wu, S. Keller, S. P. DenBaars, J. S. Speck, and S. Nakamura, "Semiconductors, dielectrics, and organic materials-101001 Temperature Dependent Capacitance-Voltage Analysis of Unintentionally Doped and Si Doped Al0. 82 In0. 18N Grown on GaN", Japanese Journal of Applied Physics, vol. 50, no. 10, 2011.
Chung, R., E. Young, D. Haeger, S. DenBaars, J. Speck, and D. Cohen, "Semipolar AlGaN Buffers for Deep Ultraviolet Diode Lasers", 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.
Chung, R. B., E. C. Young, D. A. Haeger, S. P. DenBaars, J. S. Speck, and D. A. Cohen, "Semipolar AlN on bulk GaN for UV-C diode lasers", Quantum Electronics and Laser Science Conference: Optical Society of America, pp. JTuB2, 2011.
Tyagi, A., R. M. Farrell, C-Y. Huang, P. Shan Hsu, D. A. Haeger, K. M. Kelchner, H. Ohta, S. Nakamura, S. P. DenBaars, and J. S. Speck, Semipolar iii-nitride laser diodes with etched mirrors, 2011.
Drabold, D. A., A. L. Efros, E. Fortunato, B. Gil, S. T. B. Gönnenwein, N. Grandjean, M. J Gregg, A. Hoffmann, A. A. Kaminskii, C-S. Lee, et al., Stefan Hildebrandt Ingeborg Stass: Wiley Online Library, 2011.
Koslow, I., M. Hardy, P-S. Hsu, E. Young, S. Nakamura, J. Speck, and S. DenBaars, "Strain Relaxation in Semipolar Nitrides for Optoelectronic Device Applications", 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.
Farrell, R. M., D. A. Haeger, P. Shan Hsu, U. K. Mishra, S. P. DenBaars, J. S. Speck, and S. Nakamura, STRUCTURE AND METHOD FOR ACHIEVING SELECTIVE ETCHING IN (Ga, Al, In, B) N LASER DIODES, 2011.
Farrell, R. M., M. T. Hardy, H. Ohta, S. P. DenBaars, J. S. Speck, and S. Nakamura, Structure for Improving the Mirror Facet Cleaving Yield of (Ga, Al, In, B) N Laser Diodes Grown on Nonpolar or Semipolar (Ga, Al, In, B) N Substrates, 2011.
Hardy, M. T., Y-. Da Lin, H. Ohta, S. P. DenBaars, J. S. Speck, S. Nakamura, and K. M. Kelchner, Superluminescent diodes by crystallographic etching, 2011.
2012
Dasgupta, S., J. Lu, J. S. Speck, U. K. Mishra, and others, "Scaled self-aligned N-polar GaN/AlGaN MIS-HEMTs with $ f_ ${$T$}$ $ of 275 GHz", IEEE Electron Device Letters, vol. 33, no. 7: IEEE, pp. 961–963, 2012.
Dasgupta, S., J. Lu, J. S. Speck, U. K. Mishra, and others, "Self-aligned N-polar GaN/InAlN MIS-HEMTs with record extrinsic transconductance of 1105 mS/mm", IEEE Electron Device Letters, vol. 33, no. 6: IEEE, pp. 794–796, 2012.
Zhao, Y., C-Y. Huang, S. Tanaka, C-C. Pan, K. Fujito, D. Feezell, J. S. Speck, S. DenBaars, and S. Nakamura, "Semipolar (20-2-1) Blue and Green InGaN Light-Emitting Diodes", CLEO: Applications and Technology: Optical Society of America, pp. JTh4J–2, 2012.
Huang, C-Y., Y. Zhao, M. Hardy, D. Feezell, J. S. Speck, S. DenBaars, and S. Nakamura, "Semipolar (20-2-1) Laser Diodes (λ= 505nm) with Wavelength-Stable InGaN/GaN Quantum Wells", CLEO: Science and Innovations: Optical Society of America, pp. CTu2N–5, 2012.
Hardy, M. T., S. P. DenBaars, J. S. Speck, and S. Nakamura, Strain compensated short-period superlattices on semipolar or nonpolar gan for defect reduction and stress engineering, 2012.
Hsu, P. Shan, M. T. Hardy, E. C. Young, A. E. Romanov, S. P. DenBaars, S. Nakamura, and J. S. Speck, "Stress relaxation and critical thickness for misfit dislocation formation in (10 1\= 0) and (30 31\=) InGaN/GaN heteroepitaxy", Applied Physics Letters, vol. 100, no. 17: AIP, pp. 171917, 2012.
Hardy, M. T., E. C. Young, P. Shan Hsu, D. A. Haeger, I. L. Koslow, S. Nakamura, S. P. DenBaars, and J. S. Speck, "Suppression of m-plane and c-plane slip through Si and Mg doping in partially relaxed (20 2\= 1) InGaN/GaN heterostructures", Applied Physics Letters, vol. 101, no. 13: AIP, pp. 132102, 2012.
2013
Preissler, N., O. Bierwagen, A. T. Ramu, and J. S. Speck, "The Seebeck coefficient of In 2 O 3-Inferences on causes of unintentional conductivity and electron effective mass", Verhandlungen der Deutschen Physikalischen Gesellschaft, 2013.
Speck, J. S., E. L. Hu, C. C. A. Weisbuch, Y. Seok Choi, G. Koblmüller, M. Iza, and C. Hurni, SELECTIVE DRY ETCHING OF N-FACE (Al, In, Ga) N HETEROSTRUCTURES, apr # " 25", 2013.
Feezell, D. F., J. S. Speck, S. P. DenBaars, and S. Nakamura, "Semipolar $(${$$\backslash$hbox ${$20$}$$}$$\backslash$bar ${$${$$\backslash$hbox ${$2$}$$}$$}$$\backslash$bar ${$${$$\backslash$hbox ${$1$}$$}$$}$) $ InGaN/GaN Light-Emitting Diodes for High-Efficiency Solid-State Lighting", Journal of Display Technology, vol. 9, no. 4: IEEE, pp. 190–198, 2013.
Cardwell, DW., A. Sasikumar, AR. Arehart, SW. Kaun, J. Lu, S. Keller, JS. Speck, UK. Mishra, SA. Ringel, and JP. Pelz, "Spatially-resolved spectroscopic measurements of Ec- 0.57 eV traps in AlGaN/GaN high electron mobility transistors", Applied Physics Letters, vol. 102, no. 19: AIP, pp. 193509, 2013.
Drabold, D. A., A. L. Efros, E. Fortunato, B. Gil, S. T. B. Gönnenwein, N. Grandjean, M. J Gregg, A. Hoffmann, A. A. Kaminskii, C-S. Lee, et al., Stefan Hildebrandt Sabine Bahrs, 2013.

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