Optically induced twist Fréedericksz transitions in planar-aligned nematic liquid crystals.
Optically induced twist Fréedericksz transitions in planar-aligned nematic liquid crystals.
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平面排列向列液晶中的光致扭曲 Fréedericksz 跃迁。
DOI：
10.1007/978-94-011-3180-3_23
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Shen
中科院分区：
文献类型：
--
作者：
Santamato;Abbate;Maddalena;Shen
本文研究了垂直入射的激光束在平面取向液晶中产生扭曲变形的光场诱导Freedericksz相变。在微扰极限下，同时求解了分子指向矢的欧拉方程和描述双折射介质中光束偏振演化的方程。研究了无畸变状态的稳定性。发现了一系列交替出现的稳定和不稳定分岔，这种现象在直流电场和磁场诱导的Freedericksz相变中是没有的。
The optical-field-induced Freedericksz transition for a twist deformation by a normally incident laser beam in a planar-aligned nematic liquid crystal is studied. The Euler equation for the molecular director and the equations describing the evolution of the beam polarization in the birefringent medium are solved simultaneously in the small-perturbation limit. The stability of the undistorted state is investigated. An alternate series of stable and unstable bifurcations is found. This phenomenon has no analog in the Freedericksz transition induced by dc electric and magnetic external fields.