Lin Yi-Hsin, Ren Hongwen, Wu Yung-Hsun, Zhao Yue, Fang Jiyu, Ge Zhibing, Wu Shin-Tson
Opt Express. 2005 Oct 31;13(22):8746-52. doi: 10.1364/opex.13.008746.
A polarization-independent phase-only liquid crystal (LC) phase modulator using a double-layered structure is demonstrated. Two orthogonal LC layers are separated by two ultra-thin anisotropic polymer films. The anisotropic polymeric films not only separate the LC layers but also provide good molecular alignment. As a result, a polarization-independent phase modulator with 2pi phase shift is achieved at 9Vrms and 8.1pi at 40Vrms using a 12-microm-thick E7 LC layers. This operating voltage is ~10X lower than that using a conventional 0.3-mm-thick glass separator.
展示了一种使用双层结构的与偏振无关的纯相位液晶（LC）相位调制器。两个正交的液晶层被两个超薄各向异性聚合物薄膜隔开。这些各向异性聚合物薄膜不仅分隔液晶层，还提供良好的分子排列。结果，使用12微米厚的E7液晶层，在9Vrms时实现了具有2π相移的与偏振无关的相位调制器，在40Vrms时实现了8.1π相移。该工作电压比使用传统0.3毫米厚玻璃隔板的情况低约10倍。
