Journal
OPTICS LETTERS
Volume 38, Issue 17, Pages 3370-3373Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.38.003370
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Funding
- National Science Council, Taiwan, The Republic of China [NSC 101-2221-E-002-153, NSC 99-2221-E-002-123-MY3, NSC 101-2622-E-002-002-CC2, NSC 101-2120-M-002-013]
- US Air Force Scientific Research Office [AOARD-12-4068]
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A light-emitting device consisting of a two-dimensional regularly patterned InGaN/GaN quantum well (QW) nanorod (NR) light-emitting diode (LED) array is implemented and characterized. The NR p-i-n structure includes n-GaN NR core and essentially conformal p-GaN shell. The active regions include nonpolar sidewall QWs and polar top-face QWs. A conformal layer of transparent GaZnO of low resistivity is deposited onto the NR LED structure for spreading the injection current over the sidewalls. It is found that the blue-shift range of the output spectral peak in increasing injection current is smaller than that of a planar LED of about the same operation wavelength in a similar variation range of injection current density although it is nonzero. The small blue-shift range is attributed to the mixed emission contributions from the nonpolar sidewall QWs and polar top-face QWs. (C) 2013 Optical Society of America
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