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Proceedings Paper

Dynamic studies of holographic gratings in dye-doped liquid-crystal films
Author(s): Andy Ying-Guey Fuh; Chi-Chang C. Liao; Kuei-Chu Hsu; Chao-Liang Lu; Chia-Yi Tsai
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Paper Abstract

The dynamic behavior of a holographic grating induced in a homeotropically aligned dye-doped liquid-crystal film is investigated. In the presence of an applied dc voltage, photoexcited azo dyes induce a photorefractive grating and then diffuse and are absorbed onto cell substrates. The reorientation of liquid crystals as a result of adsorbed dyes leads to a phase grating that is phase shifted 90° from the photorefractive grating. Competition of these two gratings induces two-beam couplings of the writing beams, initially transferring energy from beam 1 to beam 2 and then, after a pause, from beam 2 to beam 1.

Paper Details

Date Published: 12 December 2002
PDF: 5 pages
Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); doi: 10.1117/12.453265
Show Author Affiliations
Andy Ying-Guey Fuh, National Cheng Kung Univ. (Taiwan)
Chi-Chang C. Liao, National Cheng Kung Univ. (Taiwan)
Kuei-Chu Hsu, National Cheng Kung Univ. (Taiwan)
Chao-Liang Lu, National Cheng Kung Univ. (Taiwan)
Chia-Yi Tsai, National Cheng Kung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 4799:
Liquid Crystals VI
Iam-Choon Khoo, Editor(s)

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