TY - GEN
T1 - Polymer/(liquid crystal) composite systems for novel electro-optical effects
AU - Kajiyama, Tisato
AU - Kikuchi, Hirotsugu
AU - Takahara, Atsushi
PY - 1992
Y1 - 1992
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:0026964511
SN - 0819408190
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 20
EP - 31
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - Publ by Society of Photo-Optical Instrumentation Engineers
T2 - Proceedings of the Conference on Liquid Crystal Materials, Devices, and Applications
Y2 - 11 February 1992 through 13 February 1992
ER -