Jpn. J. Appl. Phys. 48 (2009) 102404 (4 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Temperature-Dependent Coupling Effect in Nematic Liquid Crystal Multiguide

Wen-Chi Hung, Chie-Tong Kuo, Ming-Shan Tsai¹, and Shuan-Yu Huang²

(Received May 13, 2009; revised June 15, 2009; accepted July 6, 2009; published online October 20, 2009)

The authors propose an experimental observation of the temperature-dependent coupling effect in a nematic liquid crystal (NLC) multiguide. A grating like electrode is fabricated with indium-tin-oxide in the NLC device. With the application of a voltage of 5.4 V, an optical multiguide structure is formed owing to the periodic orientation of liquid crystal molecules, induced by a grating like distributed electric field. A linearly polarized beam of 532 nm is launched into one certain channel and coupled to adjacent ones. Note that the coupling effect significantly depends on temperature. Additionally, we also observe a clear nonlinear light self-focusing phenomenon at a low light power of 15 µW.

URL: http://jjap.jsap.jp/link?JJAP/48/102404/
DOI: 10.1143/JJAP.48.102404

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