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

Bei-Bei Li; William R. Clements; Xiao-Chong Yu; Qihuang Gong; Yun-Feng Xiao

doi:10.1117/12.2030672

13 September 2013 Low-threshold Raman laser from an on-chip, high Q polymer microcavity

Bei-Bei Li, William R. Clements, Xiao-Chong Yu, Qihuang Gong, Yun-Feng Xiao

Proceedings Volume 8807, Nanophotonic Materials X; 880711 (2013) https://doi.org/10.1117/12.2030672
Event: SPIE NanoScience + Engineering, 2013, San Diego, California, United States

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.

Citation Download Citation

Bei-Bei Li, William R. Clements, Xiao-Chong Yu, Qihuang Gong, and Yun-Feng Xiao "Low-threshold Raman laser from an on-chip, high Q polymer microcavity", Proc. SPIE 8807, Nanophotonic Materials X, 880711 (13 September 2013); https://doi.org/10.1117/12.2030672

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