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Proceedings Paper

Dependence of the molecular reorientation on the direction of incident light in azo-dye doped liquid crystals
Author(s): Luogen Deng; Guohui Wang; Junliang Zhang; Liyuan Luo; Bin Shao; Yunhong Zhang
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Paper Abstract

This paper investigates an optical reorientation process of azo-dye doped liquid crystals and explains the dependence of the enhancement factor on the incident light direction. Because the order parameters of the guest-host liquid crystal system depend on the direction of the incident light, the intermolecular orientation interaction potentials is also related with the incident light direction. To describe the interaction between the cis-isomer and the liquid crystalline molecules, we re-wrote Maier-Saupe potential expression by means of the order parameters of the doped liquid crystal system. Beginning with a two-level coupling equation, we investigated a microscopic formula and an angular dependence of the enhancement factor with the liquid crystal E63 doped with the R4 azo-dye, and obtained the relation of the enhancement factor with the rotational diffusion constants and the host order parameter. The comparison of our computational results with the existent experimental results verified our enhancement factor's microscopic form.

Paper Details

Date Published: 26 January 2006
PDF: 9 pages
Proc. SPIE 6030, ICO20: Display Devices and Systems, 60300T (26 January 2006); doi: 10.1117/12.667642
Show Author Affiliations
Luogen Deng, Beijing Institute of Technology (China)
Guohui Wang, Beijing Institute of Technology (China)
Junliang Zhang, Beijing Institute of Technology (China)
Liyuan Luo, Beijing Institute of Technology (China)
Bin Shao, Beijing Institute of Technology (China)
Yunhong Zhang, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 6030:
ICO20: Display Devices and Systems
Tatsuo Uchida; Xu Liu; Hang Song, Editor(s)

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