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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 7 — Jul. 27, 2011

Anomalous enhanced emission from PbS quantum dots on a photonic-crystal microcavity

Ting Shan Luk, Shisheng Xiong, Weng W. Chow, Xiaoyu Miao, Ganapathi Subramania, Paul J. Resnick, Arthur J. Fischer, and Jeffrey C. Brinker  »View Author Affiliations


JOSA B, Vol. 28, Issue 6, pp. 1365-1373 (2011)
http://dx.doi.org/10.1364/JOSAB.28.001365


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Abstract

We report up to 75 times enhancement in emission from lithographically produced photonic crystals with postprocessing close-packed colloidal quantum-dot incorporation. In our analysis, we use the emission from a close-packed free-standing film as a reference. After discounting the angular redistribution effect, our analysis shows that the observed enhancement is larger than the combined effects of Purcell enhancement and dielectric enhancement with the microscopic local field. The additional enhancement mechanisms, which are consistent with all our observations, are thought to be spectral diffusion mediated by phonons and local polarization fluctuations that allow off-resonant excitons to emit at the cavity wavelengths.

© 2011 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(300.2140) Spectroscopy : Emission
(140.3945) Lasers and laser optics : Microcavities
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: February 15, 2011
Manuscript Accepted: March 23, 2011
Published: May 9, 2011

Virtual Issues
Vol. 6, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Ting Shan Luk, Shisheng Xiong, Weng W. Chow, Xiaoyu Miao, Ganapathi Subramania, Paul J. Resnick, Arthur J. Fischer, and Jeffrey C. Brinker, "Anomalous enhanced emission from PbS quantum dots on a photonic-crystal microcavity," J. Opt. Soc. Am. B 28, 1365-1373 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josab-28-6-1365

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