光折变聚合物分散液晶

Photorefractive polymer-dispersed liquid crystals.

作者信息

Golemme A, Volodin B L, Kippelen B, Peyghambarian N

出版信息

Opt Lett. 1997 Aug 15;22(16):1226-8. doi: 10.1364/ol.22.001226.

DOI:10.1364/ol.22.001226

Abstract

We report observation of the photorefractive effect in functionalized polymer-dispersed liquid crystals. The photoconductive properties are provided by the polymer matrix, and the field-dependent refractive-index changes are generated by the dispersed nematic liquid-crystal droplets. A high diffraction efficiency (8%) and a high refractive-index modulation amplitude (Dn = 2 x 10(-3)) are obtained in 53- microm-thick samples with an applied field of 22 V/microm.

摘要

我们报告了在功能化聚合物分散液晶中对光折变效应的观察结果。聚合物基体提供光电导特性，而场致折射率变化则由分散的向列型液晶微滴产生。在厚度为53微米的样品中，施加22伏/微米的电场时，可获得8%的高衍射效率和2×10⁻³的高折射率调制幅度（Δn）。