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

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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.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Pages20-31
Number of pages12
Volume1665
ISBN (Print)0819408190
Publication statusPublished - 1992
EventProceedings of the Conference on Liquid Crystal Materials, Devices, and Applications - San Jose, CA, USA
Duration: Feb 11 1992Feb 13 1992

Other

OtherProceedings of the Conference on Liquid Crystal Materials, Devices, and Applications
CitySan Jose, CA, USA
Period2/11/922/13/92

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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  • Cite this

    Kajiyama, T., Kikuchi, H., & Takahara, A. (1992). Polymer/(liquid crystal) composite systems for novel electro-optical effects. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 1665, pp. 20-31). Publ by Society of Photo-Optical Instrumentation Engineers.