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High contrast and low threshold holographic polymer dispersed liquid crystal grating
Author(s): 
Pages: 1504-1510
Year: Issue:  7
Journal: Optics and Precision Engineering

Keyword:  全息聚合物分散液晶光栅扭曲向列(TN)模式阈值电压对比度;
Abstract: 为了降低全息聚合物分散液晶光栅的驱动电压并提高其对比度,基于偏振原理设计了一种新型电调谐光栅.对传统的全息聚合物分散液晶(HPDLC)光栅进行了基板表面取向处理,加强液晶的均一排列程度,消除了液晶区域内的散射;然后,在光栅前面放置扭曲向列(TN)偏振调谐器,通过调节入射光的偏振方向,实现光栅内液晶折射率的变化,进而改变与聚合物折射率的差别,实现衍射强度的调谐.实验结果表明:光栅的阈值电压降低到了0...
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