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Proceedings Paper

Polymer/(liquid crystal) composite systems for novel electro-optical effects
Author(s): Tisato Kajiyama; Hirotsugu Kikuchi; Atsushi Takahara
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Paper Abstract

Aggregation states and electro-optical effects based on light scattering have been investigated for polymer (liquid crystal) composite films. The composite film was prepared by a solvent- evaporation method. Since a continuous liquid crystalline domain is embedded in a three- dimensional spongy network of polymer matrix, the liquid crystalline material is self- supported in the composite film in spite of its very low viscosity. The composite film composed of poly(methyl methacrylate) and a nematic LC(E44) with positive dielectric- anisotropy exhibited remarkable and reversible light scattering-light transmission switching under the modulation of an ac electric field. A light scattering state was dependent on optical heterogeneities such as a spatial distribution of nematic directors and/or mismatching in refractive indices of the components. Reversible and bistable electro-optical effects were also recognized for a smectic phase of a binary composite system composed of liquid crystalline polymer (LCP) and nematic LC. A light-addressed optical information storage of the LCP/nematic LC/(photoresponsive molecule) ternary composite membrane has also been demonstrated.

Paper Details

Date Published: 15 June 1992
PDF: 12 pages
Proc. SPIE 1665, Liquid Crystal Materials, Devices, and Applications, (15 June 1992); doi: 10.1117/12.60374
Show Author Affiliations
Tisato Kajiyama, Kyushu Univ. (Japan)
Hirotsugu Kikuchi, Kyushu Univ. (Japan)
Atsushi Takahara, Kyushu Univ. (Japan)

Published in SPIE Proceedings Vol. 1665:
Liquid Crystal Materials, Devices, and Applications
Paul S. Drzaic; Uzi Efron, Editor(s)

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