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Proceedings Paper

Laser-induced reorientation effect and ripple structure in dye-doped liquid crystal films
Author(s): Andy Y. G. Fuh; Chi-Chang Liao; Kuei-Chu Hsu; Chao-Liang Lu
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Paper Abstract

This article describes light-induced reorientation effects on a homeotropical dye-doped liquid crystal (DDLC) cell. The photo-excited azo dye, methyl red (MR), diffuses and adsorbs onto the substrate, thus forming a ripple structure. The adsorbed dye and laser-induced ripple structure then reorient the liquid crystal molecules and induce a holographic grating. Initially, the LC directors are reoriented primarily by the adsorbed dye. However, given sufficiently large ripple groove amplitude, the torque imposed by the ripple grooves overcomes that owing to the adsorbed dyes, and the LCs are realigned along the groove direction.

Paper Details

Date Published: 5 January 2004
PDF: 7 pages
Proc. SPIE 5213, Liquid Crystals VII, (5 January 2004); doi: 10.1117/12.504483
Show Author Affiliations
Andy Y. G. Fuh, National Cheng Kung Univ. (Taiwan)
Chi-Chang Liao, National Cheng Kung Univ. (Taiwan)
Kuei-Chu Hsu, National Cheng Kung Univ. (Taiwan)
Chao-Liang Lu, National Cheng Kung Univ. (Taiwan)


Published in SPIE Proceedings Vol. 5213:
Liquid Crystals VII
Iam-Choon Khoo, Editor(s)

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