Polymer/(liquid crystal) composite systems for novel electro-optical effects

Tisato Kajiyama; Hirotsugu Kikuchi; Atsushi Takahara

doi:10.1117/12.60374

15 June 1992 Polymer/(liquid crystal) composite systems for novel electro-optical effects

Tisato Kajiyama, Hirotsugu Kikuchi, Atsushi Takahara

Proceedings Volume 1665, Liquid Crystal Materials, Devices, and Applications; (1992) https://doi.org/10.1117/12.60374
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

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.

Citation Download Citation

Tisato Kajiyama, Hirotsugu Kikuchi, and Atsushi Takahara "Polymer/(liquid crystal) composite systems for novel electro-optical effects", Proc. SPIE 1665, Liquid Crystal Materials, Devices, and Applications, (15 June 1992); https://doi.org/10.1117/12.60374

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