向列相液晶中光致非线性效应的研究

分析了向列相液晶中的光致非线性效应.在此基础上,基于液晶显示器工作原理设计了光控光器件.提出简化模型并利用琼斯矩阵给出光在该模型中的传输理论;引入斜入射的控制光束代替外加电压来调控液晶盒中分子的排列,实现对出射信号光的位相和光强的光-光调控;利用5CB液晶的温度特性分析环境温度对光-光调控的影响.理论分析表明:出射光位...

Study on photoinduced optical non-linear effect in nematic liquid crystals

The photoinduced optical non-linear effect in nematic liquid crystals is analyzed.On this basis,an optical-optical device is obtained based on the principle of liquid crystal displays.First,the beam propagation in a simple model which is obtained based on liquid crystal displays is given by Jones matrix.Secondly,the external voltage is replaced by an oblique incidence control beam to reorientate the molecule of the liquid crystals.Base on this principle,the phase and power of the out-put beam is modulated by the control beam.Finally,the influence of temperature on optical-optical control devices is investigated based on the temperature characteristics of 5 CB liquid crystal.Numerically results indicate that the phase difference of out-put light increases monotonically with the raise of the control beam intensity,so the power of the out-put beam appears periodic oscillation with the increases of the control beam intensity.The out-put beam intensity of the signal beam can be linear modulated by the adjustment of the control beam intensity when the control beam intensity changes from 0.5(MW·m^-2)to 1.1(MW·m^-2).It is found that the power of the out-put beam shows periodic oscillation with the increases of the temperature when the control light intensity is fixed.This discovery shows a available scheme for the achievement of optical device.