Laser-induced reorientation effect and ripple structure in dye-doped liquid crystal films

Andy Y. G. Fuh; Chi-Chang Liao; Kuei-Chu Hsu; Chao-Liang Lu

doi:10.1117/12.504483

5 January 2004 Laser-induced reorientation effect and ripple structure in dye-doped liquid crystal films

Andy Y. G. Fuh, Chi-Chang Liao, Kuei-Chu Hsu, Chao-Liang Lu

Proceedings Volume 5213, Liquid Crystals VII; (2004) https://doi.org/10.1117/12.504483
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

Citation Download Citation

Andy Y. G. Fuh, Chi-Chang Liao, Kuei-Chu Hsu, and Chao-Liang Lu "Laser-induced reorientation effect and ripple structure in dye-doped liquid crystal films", Proc. SPIE 5213, Liquid Crystals VII, (5 January 2004); https://doi.org/10.1117/12.504483

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