反向扭曲向列型液晶光栅的偏振特性

Polarization properties of inversely twisted nematic liquid-crystal gratings.

作者信息

He Z, Sato S

出版信息

Appl Opt. 1998 Oct 1;37(28):6755-63. doi: 10.1364/ao.37.006755.

DOI:10.1364/ao.37.006755

Abstract

Based on the Jones matrix representation of twisted nematic liquid crystals (LC's), we have carried out a theoretical analysis of the polarization properties of inversely twisted nematic (ITN) LC gratings. Some interesting polarization behaviors are expected in the ITN LC grating. When a linearly polarized light parallel or perpendicular to the grating direction is incident on the ITN LC grating, the diffracted light in the 0th order is linearly polarized with the same polarization direction of incident light, while the diffracted light in high orders is linearly polarized perpendicular to that of incident light. Using a multirubbing alignment technique, we have practically prepared an ITN LC grating with ?45 degrees inversely twisted structures. The experimental investigations of the optical characteristics of the ITN LC grating demonstrate agreement with theoretical expectations.

摘要

基于扭曲向列型液晶（LC）的琼斯矩阵表示，我们对反向扭曲向列型（ITN）LC光栅的偏振特性进行了理论分析。预计ITN LC光栅会出现一些有趣的偏振行为。当平行或垂直于光栅方向的线偏振光入射到ITN LC光栅上时，零级衍射光的偏振方向与入射光相同，为线偏振光，而高级衍射光的偏振方向与入射光垂直，为线偏振光。我们采用多次摩擦取向技术，实际制备了具有45度反向扭曲结构的ITN LC光栅。对ITN LC光栅光学特性的实验研究表明与理论预期相符。