摘要
介绍了一种通过改变电极上的驱动电压来测量和调控入射光偏振态的液晶器件,同时模拟了该器件的液晶分子指向矢分布。众所周知,液晶分子的倾斜角较容易控制,却常忽视其扭曲角同样可以被调控。所以,液晶材料能够用作可变化、可转动的相位延迟器,这样就可以实现用同一器件结构测量入射光偏振态,随后调控该入射光偏振态。模拟了在十字结构电极下液晶层的指向矢分布,表明扭曲角可被电控,同时也说明将入射光偏振态调控到任意偏振态是可以实现的。
The design of a liquid crystal （LC） device was presented, which could be used to measure and regulate the polarization state of the incident light by only changing the voltage amplitude of the driving signal applied over the patterned electrodes, and simulate the direction orientation distribution in the LC layer of the device. As known, the tilt angle of the LC molecular can be controlled easily. However, it always was ignored that the twist angle could also be electrically controlled. So, the LC material can be used as a variable and rotatable phase retarder, and then the polarization state was regulated after measuring the polarized incident light through the same testing architecture. The direction orientation distribution of the LC layer with the cross-shape electrodes was simulated firstly. Results show that the twist angle can be electrically controlled, and it is achievable to regulate the polarized state of incident light to any desired polarization state.
出处
《红外与激光工程》
EI
CSCD
北大核心
2014年第2期474-478,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(61176052
60777003)
中央高校基本科研业务专项基金(2011TS154)
武汉国家光电实验室重点基金(0101187006)
关键词
液晶
偏振态
阵列器件
liquid crystal
polarization state
arrayed device
