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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 2733–2740

High quality factor whispering gallery modes from self-assembled hexagonal GaN rods grown by metal-organic vapor phase epitaxy

C. Tessarek, G. Sarau, M. Kiometzis, and S. Christiansen  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 2733-2740 (2013)

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Self-assembled GaN rods were grown on sapphire by metal-organic vapor phase epitaxy using a simple two-step method that relies first on a nitridation step followed by GaN epitaxy. The mask-free rods formed without any additional catalyst. Most of the vertically aligned rods exhibit a regular hexagonal shape with sharp edges and smooth sidewall facets. Cathodo- and microphotoluminescence investigations were carried out on single GaN rods. Whispering gallery modes with quality factors greater than 4000 were measured demonstrating the high morphological and optical quality of the self-assembled GaN rods.

© 2013 OSA

OCIS Codes
(160.4670) Materials : Optical materials
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.5750) Optical devices : Resonators
(250.1500) Optoelectronics : Cathodoluminescence
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Integrated Optics

Original Manuscript: July 19, 2012
Revised Manuscript: September 29, 2012
Manuscript Accepted: December 19, 2012
Published: January 29, 2013

C. Tessarek, G. Sarau, M. Kiometzis, and S. Christiansen, "High quality factor whispering gallery modes from self-assembled hexagonal GaN rods grown by metal-organic vapor phase epitaxy," Opt. Express 21, 2733-2740 (2013)

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