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Proceedings Paper

Optical switching behavior of liquid crystalline polymer networks containing azobenzene molecules
Author(s): Seiji Kurihara; Akihisa Sakamoto; Daisuke Yoneyama; Takamasa Nonaka
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Paper Abstract

Photoresponsive liquid crystalline polymer networks with macroscopically uniaxial molecular orientation were prepared by polymerizing mixtures of liquid crystalline mono and di- acrylates, and an azobenzene compound in a homogeneous glass cell at a nematic phase. The polymer networks showed an enantiotropic phase transition from an anisotropic phase to an isotropic phase as well as high transparency. The photoisomerization of the azobenzene compound resulted in a change in a birefringence. The photochemical change in the birefringence was investigated by using a Xe lamp and a single pulse light from a Nd:YAG laser at light sources. We observed a response time in a range of a few microseconds and a decay time in a range of a few microhundreds of seconds. The optical switching behavior depended on the cross-linking density of the liquid crystalline polymer networks.

Paper Details

Date Published: 14 October 1999
PDF: 9 pages
Proc. SPIE 3800, Liquid Crystals III, (14 October 1999); doi: 10.1117/12.365793
Show Author Affiliations
Seiji Kurihara, Kumamoto Univ. (Japan)
Akihisa Sakamoto, Kumamoto Univ. (Japan)
Daisuke Yoneyama, Kumamoto Univ. (Japan)
Takamasa Nonaka, Kumamoto Univ. (Japan)

Published in SPIE Proceedings Vol. 3800:
Liquid Crystals III
Iam-Choon Khoo, Editor(s)

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