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Proceedings Paper

All-optically controlled light valve assembled by photorefractive crystal and PDLC hybrid structure
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Paper Abstract

A light-valve device, assembled by Ru–doped Bi12SiO20 (BSO) photoconductive substrate and polymer dispersed liquid crystal layer is proposed, in which all the processes are controlled by the near infrared light. Laser beam illumination (Gaussian shape) on BSO:Ru crystal caused charge carriers generation, which migrate and form an inhomogeneous distribution and subsequent space charge field. This surface-localized electromagnetic field penetrates into the PDLC layer and modulate the orientation of the liquid crystals, that caused reverse of the device initial opaque state to the highly transparent one. The proposed structure is simple and easy to fabricate, without requirements of ITO contacts and alignment layers and opens further possibilities for near-infrared applications.

Paper Details

Date Published: 8 May 2015
PDF: 6 pages
Proc. SPIE 9508, Holography: Advances and Modern Trends IV, 95080O (8 May 2015); doi: 10.1117/12.2178985
Show Author Affiliations
Vera Marinova, National Chiao Tung Univ. (Taiwan)
Institute of Optical Materials and Technologies (Bulgaria)
Ren Chung Liu, National Chiao Tung Univ. (Taiwan)
Ming Syuan Chen, National Chiao Tung Univ. (Taiwan)
Shiuan Huei Lin, National Chiao Tung Univ. (Taiwan)
Yi Hsin Lin, National Chiao Tung Univ. (Taiwan)
Ken Yuh Hsu, National Chiao Tung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 9508:
Holography: Advances and Modern Trends IV
Miroslav Hrabovský; John T. Sheridan; Antonio Fimia, Editor(s)

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