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Proceedings Paper

Low-threshold Raman laser from an on-chip, high Q polymer microcavity
Author(s): Bei-Bei Li; William R. Clements; Xiao-Chong Yu; Qihuang Gong; Yun-Feng Xiao
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Paper 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 2900 cm-1, 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.

Paper Details

Date Published: 13 September 2013
PDF: 7 pages
Proc. SPIE 8807, Nanophotonic Materials X, 880711 (13 September 2013); doi: 10.1117/12.2030672
Show Author Affiliations
Bei-Bei Li, Peking Univ. (China)
William R. Clements, Peking Univ. (China)
Xiao-Chong Yu, Peking Univ. (China)
Qihuang Gong, Peking Univ. (China)
Yun-Feng Xiao, Peking Univ. (China)

Published in SPIE Proceedings Vol. 8807:
Nanophotonic Materials X
Stefano Cabrini; Gilles Lérondel; Adam M. Schwartzberg; Taleb Mokari, Editor(s)

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