Publications

Found 158 results
Author Title Type [ Year(Desc)]
Filters: Author is Mishra, Umesh K  [Clear All Filters]
2011
Rajan, S., C. Soo Suh, J. S. Speck, and U. K. Mishra, N-polar aluminum gallium nitride/gallium nitride enhancement-mode field effect transistor, 2011.
Dasgupta, S., S. Keller, J. S. Speck, U. K. Mishra, and others, "N-Polar GaN/AlN MIS-HEMT With $ f_ ${$$\backslash$rm MAX$}$ $ of 204 GHz for Ka-Band Applications", IEEE Electron Device Letters, vol. 32, no. 12: IEEE, pp. 1683–1685, 2011.
Neufeld, C. J., S. C. Cruz, R. M. Farrell, M. Iza, S. Keller, S. Nakamura, S. P. DenBaars, J. S. Speck, and U. K. Mishra, "Observation of positive thermal power coefficient in InGaN/GaN quantum well solar cells", Applied Physics Letters, vol. 99, no. 7: AIP, pp. 071104, 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.
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.
Singisett, U., M. Hoi Wong, J. S. Speck, and U. K. Mishra, "Vertically scaled 5 nm GaN channel enhancement-mode N-polar GaN MOS-HFET with 560 mS/mm g m and 0.76 Ω-mm R on", Device Research Conference (DRC), 2011 69th Annual: IEEE, pp. 1–2, 2011.
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.
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.
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.
Lu, J., Y-L. Hu, D. F. Brown, F. Wu, S. Keller, J. S. Speck, S. P. DenBaars, and U. K. Mishra, "Charge and Mobility Enhancements in In-Polar InAl (Ga) N/Al (Ga) N/GaN Heterojunctions Grown by Metal–Organic Chemical Vapor Deposition Using a Graded Growth Strategy", Japanese Journal of Applied Physics, vol. 51, no. 11R: IOP Publishing, pp. 115502, 2012.
Kaun, S. W., M. Hoi Wong, U. K. Mishra, and J. S. Speck, "Correlation between threading dislocation density and sheet resistance of AlGaN/AlN/GaN heterostructures grown by plasma-assisted molecular beam epitaxy", Applied Physics Letters, vol. 100, no. 26: AIP, pp. 262102, 2012.
Yeluri, R., C. A. Hurni, S. Chowdhury, J. S. Speck, and U. K. Mishra, "Demonstration of Low ON-Resistance CAVETS with Ammonia MBE Grown Active p-GaN Layer as the Current Blocking Layer for High Power Applications", Meeting Abstracts, no. 30: The Electrochemical Society, pp. 2531–2531, 2012.
Toledo, N. G., D. J. Friedman, R. M. Farrell, E. E. Perl, C-T. Lin, J. E. Bowers, J. S. Speck, and U. K. Mishra, "Design of integrated III-nitride/non-III-nitride tandem photovoltaic devices", Journal of Applied Physics, vol. 111, no. 5: AIP, pp. 054503, 2012.
Kaun, S. W., P. G. Burke, M. Hoi Wong, E. C. H. Kyle, U. K. Mishra, and J. S. Speck, "Effect of dislocations on electron mobility in AlGaN/GaN and AlGaN/AlN/GaN heterostructures", Applied Physics Letters, vol. 101, no. 26: AIP, pp. 262102, 2012.
Keller, S., J. Lu, U. K. Mishra, S. P. DenBaars, and J. S. Speck, "Effect of indium on the conductivity of poly-crystalline GaN grown on high purity fused silica", physica status solidi (a), vol. 209, no. 3: WILEY-VCH Verlag Berlin, pp. 431–433, 2012.
Fujiwara, T., S. Keller, J. S. Speck, S. P. DenBaars, and U. K. Mishra, "Enhancement-mode m-plane AlGaN/GaN HFETs with regrown n+-GaN contact layer", physica status solidi (c), vol. 9, no. 3-4: Wiley Online Library, pp. 891–893, 2012.
Singisetti, U., M. Hoi Wong, J. S. Speck, and U. K. Mishra, "Enhancement-Mode N-Polar GaN MOS-HFET With 5-nm GaN Channel, 510-mS/mm $ g_ ${$m$}$ $, and 0.66-$$\backslash$Omega$\backslash$cdot$\backslash$hbox ${$mm$}$ $ $ R_ ${$$\backslash$rm on$}$ $", IEEE Electron Device Letters, vol. 33, no. 1: IEEE, pp. 26–28, 2012.
Dasgupta, S., F. Wu, J. S. Speck, U. K. Mishra, and others, "Growth and Characterization of N-Polar GaN Films on Si (111) by Plasma Assisted Molecular Beam Epitaxy", Japanese Journal of Applied Physics, vol. 51, no. 11R: IOP Publishing, pp. 115503, 2012.
Speck, J. S., S. P. DenBaars, U. K. Mishra, and S. Nakamura, High Performance InGaN-Based Solar Cells: DTIC Document, 2012.
Farrell, R. M., C. J. Neufeld, N. G. Toledo, S. P. DenBaars, U. K. Mishra, J. S. Speck, and S. Nakamura, Iii-nitride flip-chip solar cells, jul # " 19", 2012.
Wong, M. Hoi, F. Wu, C. A. Hurni, S. Choi, J. S. Speck, and U. K. Mishra, "Molecular beam epitaxy of InAlN lattice-matched to GaN with homogeneous composition using ammonia as nitrogen source", Applied Physics Letters, vol. 100, no. 7: AIP, pp. 072107, 2012.
Craven, M. D., S. Keller, S. P. DenBaars, T. Margalith, J. S. Speck, S. Nakamura, and U. K. Mishra, Non-polar (Al, B, In, Ga) N quantum well and heterostructure materials and devices, may # " 29", 2012.
Craven, M. D., S. Keller, S. P. DenBaars, T. Margalith, J. Stephen Speck, S. Nakamura, and U. K. Mishra, NON-POLAR (Al, B, In, Ga) N QUANTUM WELL AND HETEROSTRUCTURE MATERIALS AND DEVICES, 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.

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