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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 8 — Apr. 12, 2010
  • pp: 8466–8481

Silicon nanocrystals on bottle resonators: Mode structure, loss mechanisms and emission dynamics

P. Bianucci, X. Wang, J. G. C. Veinot, and A. Meldrum  »View Author Affiliations


Optics Express, Vol. 18, Issue 8, pp. 8466-8481 (2010)
http://dx.doi.org/10.1364/OE.18.008466


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Abstract

Bottle resonators can support high Q-factor whispering gallery modes (WGMs) and demonstrate a rich mode spectrum. Resonators were fabricated using a fiber tapering apparatus and were coated with a thin, smooth layer of luminescent silicon nanocrystals. The photoluminescence spectrum showed WGM peaks with Q-factors near 2,500; however, evanescent measurements showed that these modes are a composite of many modes with Q-factors exceeding 106, the highest yet seen for a silicon-nanocrystal-coated microresonators. The mode structure showed strong polarization and sensitivity to position within the bottle resonator. An analysis of loss mechanisms establishes surface roughness scattering as the limiting factor in these nanocrystal-coated bottle resonators in the absence of excited carriers.

© 2010 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(250.5230) Optoelectronics : Photoluminescence
(140.3948) Lasers and laser optics : Microcavity devices

ToC Category:
Optical Devices

History
Original Manuscript: February 12, 2010
Revised Manuscript: April 1, 2010
Manuscript Accepted: April 2, 2010
Published: April 7, 2010

Citation
P. Bianucci, X. Wang, J. G. Veinot, and A. Meldrum, "Silicon nanocrystals on bottle resonators: Mode structure, loss mechanisms and emission dynamics," Opt. Express 18, 8466-8481 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-8-8466


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