液晶衍射光栅的理论分析

Simulation of Liquid Crystal Diffraction Grating

在液晶指向矢计算的基础上,得到了向列相液晶在电场下折射率分布和相位延迟。并在矩形光栅和正弦相位光栅的基础上,分析了液晶衍射光栅对入射光一级衍射情况及其衍射效率,得到了15°左右的衍射角,且衍射效率达到40%。

The refractive indices and phase delay of NLC in electric field was presented on the basis of the calculation of liquid crystal director distributions. The theory on the phenomenon of the control to the incident light＇s first diffraction light and its diffraction efficiency by diffraction grating was analyzed based on rectangular grating and sinusoidal phase grating. The diffraction angle is about 15 °, and the diffraction efficiency reaches to 40%.