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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 21 — Oct. 21, 2013
  • pp: 25517–25525

Blue-green emitting microdisks using low-temperature-grown ZnO on patterned silicon substrates

Marcel Ruth, Thomas Zentgraf, and Cedrik Meier  »View Author Affiliations


Optics Express, Vol. 21, Issue 21, pp. 25517-25525 (2013)
http://dx.doi.org/10.1364/OE.21.025517


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Abstract

Zinc oxide (ZnO) as an extremely bright emitter is an attractive material for photonic devices. However, devices made of epitaxially grown ZnO are difficult to fabricate due to the lack of selective etching processes. Here, we demonstrate that by a low-temperature growth process on pre-patterned silicon dioxide (SiO2) microdisks (MDs) high quality ZnO resonators are created. The devices exhibit whispering gallery modes (WGMs) over the blue-green part of the visible spectrum with quality factors exceeding Q = 3500, which are among the highest values reported in this material system so far. By deposition of SiO2 capping layers we find an enhanced coupling of the spontaneous emission from the active medium into the MDs, observed by sharp WGMs up to a radial quantum number of N = 3.

© 2013 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Optical Devices

History
Original Manuscript: July 24, 2013
Revised Manuscript: September 11, 2013
Manuscript Accepted: September 22, 2013
Published: October 18, 2013

Citation
Marcel Ruth, Thomas Zentgraf, and Cedrik Meier, "Blue-green emitting microdisks using low-temperature-grown ZnO on patterned silicon substrates," Opt. Express 21, 25517-25525 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-21-25517


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