First-order Fréedericksz transition and front propagation in a liquid crystal light valve with feedback

被引：0

作者：

M. G. Clerc

T. Nagaya

A. Petrossian

S. Residori

C. S. Riera

机构：

[1] Universidad de Chile,Departamento de Física, Facultad de Ciencias Físicas y Matemáticas

[2] Okayama University,Department of Electrical and Electronic Engineering, Faculty of Engineering

[3] Yerevan St. University 1,Physics Department

[4] UMR 6618 CNRS-UNSA,Institut Non Linéaire de Nice

[5] DAMTP-CMS,undefined

来源：

The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics | 2004年 / 28卷

关键词：

Liquid Crystal; Bifurcation Diagram; Front Velocity; Front Propagation; Optical Feedback;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Fréedericksz transition can become subcritical in the presence of a feedback mechanism that leads to the dependence of the local electric field onto the liquid crystal re-orientation angle. We have characterized experimentally the first-order Fréedericksz transition in a Liquid Crystal Light Valve with optical feedback. The bistability region is determined, together with the Fréedericksz transition point and the Maxwell point. We show the propagation of fronts connecting the different metastable states and we estimate the front velocity. Theoretically, we derive an amplitude equation, valid close to the Fréedericksz transition point, which accounts for the subcritical character of the bifurcation.

引用

页码：435 / 445

页数：10