Orientational Photorefractive Gratings Observed in Polymer Dispersed Liquid Crystals Doped with Fullerene
Orientational Photorefractive Gratings Observed in Polymer Dispersed Liquid Crystals Doped with Fullerene
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富勒烯掺杂聚合物分散液晶中观察到的定向光折变光栅
DOI：
10.1143/jjap.36.6444
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发表时间：
1997
影响因子：
1.5
通讯作者：
Hiroshi Ono Kawatsuki
中科院分区：
文献类型：
--
作者：
Hiroshi Ono Kawatsuki
提出了以富勒烯（C60）为光敏剂的聚合物分散液晶（PDLCs）取向光折变材料，讨论了空间电荷场引起液晶分子取向改变的光栅形成机理。取向光折变PDLC在Raman-Nath区获得了10-3量级的大折射率调制。对于40 wt/60 wt（聚合物/液晶）样品，获得了稳定的再取向记忆效应。
We presented orientational photorefractive materials based on polymer dispersed liquid crystals (PDLCs) doped with fullerene ( C60) as photoconductive sensitizer and discussed the grating formation mechanism originating in the space charge field and resulting in reorientation of liquid crystal molecules. A large refractive index modulation of the order of 10-3 was obtained in the Raman-Nath region for orientational photorefractive PDLCs. A stable memory effect of the reorientation was obtained for a 40 wt/60 wt (polymer/liquid crystal) sample.