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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 11 — Jun. 1, 2013
  • pp: 1802–1804

Low-threshold Raman laser from an on-chip, high-Q, polymer-coated microcavity

Bei-Bei Li, Yun-Feng Xiao, Meng-Yuan Yan, William R. Clements, and Qihuang Gong  »View Author Affiliations


Optics Letters, Vol. 38, Issue 11, pp. 1802-1804 (2013)
http://dx.doi.org/10.1364/OL.38.001802


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Abstract

We study the stimulated Raman emission of a high-Q polydimethylsiloxane (PDMS)-coated silica microsphere on a silicon chip. In this hybrid structure, as the thickness of the PDMS coating increases, the spatial distribution of the whispering gallery modes moves inside the PDMS layer, and the light emission switches from silica Raman lasing to PDMS Raman lasing. The Raman shift of the PDMS Raman laser is measured at 2900cm1, corresponding to the strongest Raman fingerprint of bulk PDMS material. The threshold for this PDMS Raman lasing is demonstrated to be as low as 1.3 mW. This type of Raman emission from a surface-coated high-Q microcavity not only provides a route for extending lasing wavelengths, but also shows potential for detecting specific analytes.

© 2013 Optical Society of America

OCIS Codes
(160.5470) Materials : Polymers
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(290.5910) Scattering : Scattering, stimulated Raman
(140.3948) Lasers and laser optics : Microcavity devices

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 25, 2013
Revised Manuscript: April 23, 2013
Manuscript Accepted: April 23, 2013
Published: May 20, 2013

Citation
Bei-Bei Li, Yun-Feng Xiao, Meng-Yuan Yan, William R. Clements, and Qihuang Gong, "Low-threshold Raman laser from an on-chip, high-Q, polymer-coated microcavity," Opt. Lett. 38, 1802-1804 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-11-1802


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