Publications

Found 28 results
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2016
Young, NG., RM. Farrell, M. Iza, S. Nakamura, SP. DenBaars, C. Weisbuch, and JS. Speck, "Germanium doping of GaN by metalorganic chemical vapor deposition for polarization screening applications", Journal of Crystal Growth, vol. 455: North-Holland, pp. 105–110, 2016.
Pynn, CD., SJ. Kowsz, SH. Oh, H. Gardner, RM. Farrell, S. Nakamura, JS. Speck, and SP. DenBaars, "Green semipolar III-nitride light-emitting diodes grown by limited area epitaxy", Applied Physics Letters, vol. 109, no. 4: AIP Publishing, pp. 041107, 2016.
Young, NG., RM. Farrell, S. Oh, M. Cantore, F. Wu, S. Nakamura, SP. DenBaars, C. Weisbuch, and JS. Speck, "Polarization field screening in thick (0001) InGaN/GaN single quantum well light-emitting diodes", Applied Physics Letters, vol. 108, no. 6: AIP Publishing, pp. 061105, 2016.
Myzaferi, A., AH. Reading, DA. Cohen, RM. Farrell, S. Nakamura, JS. Speck, and SP. DenBaars, "Transparent conducting oxide clad limited area epitaxy semipolar III-nitride laser diodes", Applied Physics Letters, vol. 109, no. 6: AIP Publishing, pp. 061109, 2016.
2015
Kowsz, SJ., CD. Pynn, SH. Oh, RM. Farrell, JS. Speck, SP. DenBaars, and S. Nakamura, "Demonstration of phosphor-free polarized white light emission from monolithically integrated semipolar InGaN quantum wells", Applied Physics Letters, vol. 107, no. 10: AIP Publishing, pp. 101104, 2015.
Pourhashemi, A., RM. Farrell, DA. Cohen, JS. Speck, SP. DenBaars, and S. Nakamura, "High-power blue laser diodes with indium tin oxide cladding on semipolar (20 2 1) GaN substrates", Applied Physics Letters, vol. 106, no. 11: AIP Publishing, pp. 111105, 2015.
Leonard, JT., DA. Cohen, BP. Yonkee, RM. Farrell, T. Margalith, S. Lee, SP. DenBaars, JS. Speck, and S. Nakamura, "Nonpolar III-nitride vertical-cavity surface-emitting lasers incorporating an ion implanted aperture", Applied Physics Letters, vol. 107, no. 1: AIP Publishing, pp. 011102, 2015.
Leonard, JT., DA. Cohen, BP. Yonkee, RM. Farrell, SP. DenBaars, JS. Speck, and S. Nakamura, "Smooth e-beam-deposited tin-doped indium oxide for III-nitride vertical-cavity surface-emitting laser intracavity contacts", Journal of Applied Physics, vol. 118, no. 14: AIP Publishing, pp. 145304, 2015.
2014
Young, NG., EE. Perl, RM. Farrell, M. Iza, S. Keller, JE. Bowers, S. Nakamura, SP. DenBaars, and JS. Speck, "High-performance broadband optical coatings on InGaN/GaN solar cells for multijunction device integration", Applied Physics Letters, vol. 104, no. 16: AIP, pp. 163902, 2014.
Holder, CO., JT. Leonard, RM. Farrell, DA. Cohen, B. Yonkee, JS. Speck, SP. DenBaars, S. Nakamura, and DF. Feezell, "Nonpolar III-nitride vertical-cavity surface emitting lasers with a polarization ratio of 100% fabricated using photoelectrochemical etching", Applied Physics Letters, vol. 105, no. 3: AIP, pp. 031111, 2014.
2013
Farrell, RM., AA. Al-Heji, CJ. Neufeld, X. Chen, M. Iza, SC. Cruz, S. Keller, S. Nakamura, SP. DenBaars, UK. Mishra, et al., "Effect of intentional p-GaN surface roughening on the performance of InGaN/GaN solar cells", Applied Physics Letters, vol. 103, no. 24: AIP, pp. 241104, 2013.
Young, NG., RM. Farrell, YL. Hu, Y. Terao, M. Iza, S. Keller, SP. DenBaars, S. Nakamura, and JS. Speck, "High performance thin quantum barrier InGaN/GaN solar cells on sapphire and bulk (0001) GaN substrates", Applied Physics Letters, vol. 103, no. 17: AIP, pp. 173903, 2013.
Farrell, RM., DA. Haeger, K. Fujito, SP. DenBaars, S. Nakamura, and JS. Speck, "Morphological evolution of InGaN/GaN light-emitting diodes grown on free-standing m-plane GaN substrates", Journal of Applied Physics, vol. 113, no. 6: AIP, pp. 063504, 2013.
Das, NC., ML. Reed, AV. Sampath, H. Shen, M. Wraback, RM. Farrell, M. Iza, SC. Cruz, , NG. Young, et al., "Optimization of annealing process for improved InGaN solar cell performance", Journal of electronic materials, vol. 42, no. 12: Springer US, pp. 3467–3470, 2013.
Pourhashemi, A., RM. Farrell, MT. Hardy, PS. Hsu, KM. Kelchner, JS. Speck, SP. DenBaars, and S. Nakamura, "Pulsed high-power AlGaN-cladding-free blue laser diodes on semipolar (20 2 1) GaN substrates", Applied Physics Letters, vol. 103, no. 15: AIP, pp. 151112, 2013.
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.
Das, NC., ML. Reed, AV. Sampath, H. Shen, M. Wraback, RM. Farrell, M. Iza, SC. Cruz, , NG. Young, et al., "Heterogeneous integration of InGaN and Silicon solar cells for enhanced energy harvesting", Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE: IEEE, pp. 003076–003079, 2012.
Farrell, RM., EC. Young, F. Wu, SP. DenBaars, and JS. Speck, "Materials and growth issues for high-performance nonpolar and semipolar light-emitting devices", Semiconductor Science and Technology, vol. 27, no. 2: IOP Publishing, pp. 024001, 2012.
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.
Hardy, MT., RM. Farrell, P. S. Hsu, DA. Haeger, K. Kelchner, K. Fujito, A. Chakraborty, DA. Cohen, S. Nakamura, JS. Speck, et al., "Effect of n-AlGaN cleave assistance layers on the morphology of c-plane cleaved facets for m-plane InGaN/GaN laser diodes", physica status solidi (c), vol. 8, no. 7-8: Wiley Online Library, pp. 2226–2228, 2011.
Farrell, RM., DA. Haeger, PS. Hsu, MC. Schmidt, K. Fujito, DF. Feezell, SP. DenBaars, JS. Speck, and S. Nakamura, "High-power blue-violet AlGaN-cladding-free m-plane InGaN/GaN laser diodes", Applied Physics Letters, vol. 99, no. 17: AIP, pp. 171113, 2011.
2010
Farrell, RM., DA. Haeger, X. Chen, M. Iza, A. Hirai, KM. Kelchner, K. Fujito, A. Chakraborty, S. Keller, SP. DenBaars, et al., "Effect of carrier gas and substrate misorientation on the structural and optical properties of m-plane InGaN/GaN light-emitting diodes", Journal of Crystal Growth, vol. 313, no. 1: Elsevier, pp. 1–7, 2010.
Farrell, RM., PS. Hsu, DA. Haeger, K. Fujito, SP. DenBaars, JS. Speck, and S. Nakamura, "Low-threshold-current-density AlGaN-cladding-free m-plane InGaN/GaN laser diodes", Applied Physics Letters, vol. 96, no. 23: AIP, pp. 231113, 2010.
Farrell, RM., DA. Haeger, X. Chen, CS. Gallinat, RW. Davis, M. Cornish, K. Fujito, S. Keller, SP. DenBaars, S. Nakamura, et al., "Origin of pyramidal hillocks on GaN thin films grown on free-standing m-plane GaN substrates", Applied Physics Letters, vol. 96, no. 23: AIP, pp. 231907, 2010.
2007
Nakamura, S., SP. DenBaars, JS. Speck, MC. Schmidt, KC. Kim, RM. Farrell, DF. Feezell, DA. Cohen, M. Saito, H. Sato, et al., "CK-1-1 Recent Performance of Nonpolar/Semipolar GaN-based Blue LEDs/LDs", ?????????????????????, vol. 2007, no. 2: ??????????????, 2007.

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