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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 25 — Dec. 5, 2011
  • pp: 25528–25534

Optical performance of top-down fabricated InGaN/GaN nanorod light emitting diode arrays

Qiming Li, Karl R. Westlake, Mary H. Crawford, Stephen R. Lee, Daniel D. Koleske, Jeffery J. Figiel, Karen C. Cross, Saeed Fathololoumi, Zetian Mi, and George T. Wang  »View Author Affiliations


Optics Express, Vol. 19, Issue 25, pp. 25528-25534 (2011)
http://dx.doi.org/10.1364/OE.19.025528


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Abstract

Vertically aligned InGaN/GaN nanorod light emitting diode (LED) arrays were created from planar LED structures using a new top-down fabrication technique consisting of a plasma etch followed by an anisotropic wet etch. The wet etch results in straight, smooth, well-faceted nanorods with controllable diameters and removes the plasma etch damage. 94% of the nanorod LEDs are dislocation-free and a reduced quantum confined Stark effect is observed due to reduced piezoelectric fields. Despite these advantages, the IQE of the nanorod LEDs measured by photoluminescence is comparable to the planar LED, perhaps due to inefficient thermal transport and enhanced nonradiative surface recombination.

© 2011 OSA

OCIS Codes
(160.6000) Materials : Semiconductor materials
(230.3670) Optical devices : Light-emitting diodes
(250.5230) Optoelectronics : Photoluminescence
(160.4236) Materials : Nanomaterials
(220.4241) Optical design and fabrication : Nanostructure fabrication

ToC Category:
Optical Devices

History
Original Manuscript: October 6, 2011
Revised Manuscript: November 16, 2011
Manuscript Accepted: November 17, 2011
Published: November 30, 2011

Citation
Qiming Li, Karl R. Westlake, Mary H. Crawford, Stephen R. Lee, Daniel D. Koleske, Jeffery J. Figiel, Karen C. Cross, Saeed Fathololoumi, Zetian Mi, and George T. Wang, "Optical performance of top-down fabricated InGaN/GaN nanorod light emitting diode arrays," Opt. Express 19, 25528-25534 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-25-25528


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