Orientational photorefractive properties in polymer dispersed liquid crystals with different polymer matrix

被引：3
|
作者：
Ono, H [1 ]
Saito, I [1 ]
Kawatsuki, N [1 ]
机构：
[1] Nagaoka Univ Technol, Dept Elect Engn, Nagaoka, Niigata 9402188, Japan
来源：
LIQUID CRYSTALS II | 1998年 / 3475卷
关键词：
polymer dispersed liquid crystal; photorefractive effect; hologram; photoconductive effect; nonlinear optics; two-wave mixing; degenerate four wave mixing;
D O I：
10.1117/12.326898
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report orientational photorefractive effects observed in photoconductive liquid crystals (LCs) contained with three kinds of polymer, i.e., poly(methyl methacrylate) (PMMA), poly(vinyl alcohol) (PVA) and a side-chain liquid crystalline polymer (SLCP1). The morphology of the photorefractive composites depended on the kind of polymer strongly. In both PMMA and PVA cases, LC and polymer were phase-separated and the composites showed memory effects. In SLCP1 case, the phase-separation in the composite dose not occur and the high resolution could be achieved. In this case, the photorefractive Bragg gratings were generated and a high two-beam coupling gain coefficient (75 cm(-1)) with a low applied field of 4 V/mu m was observed.
引用
收藏
页码：122 / 133
页数：12
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