Simulation and optimization of liquid crystal gratings with alternate twisted nematic and planar aligned regions
Simulation and optimization of liquid crystal gratings with alternate twisted nematic and planar aligned regions
复制标题
具有交替扭曲向列和平面对准区域的液晶光栅的仿真和优化
DOI：
10.1364/ao.53.000e14
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发表时间：
2014-08-01
期刊：
影响因子：
1.9
通讯作者：
Lu, Yan-Qing
中科院分区：
文献类型：
--
作者：
Li, Jia-Nan;Hu, Xi-Kui;Lu, Yan-Qing
模拟了具有交错扭曲向列（TN）和平面排列（PA）区域的液晶光栅的电光特性。介绍了三个典型步骤：首先，模拟了两个不同区域的LC director分布。然后，通过琼斯矩阵计算出各区域出射光的相位和幅值。在此基础上，通过傅里叶变换得到了与电压相关的衍射效率。对这种光栅的机理作了准确的解释。通过光图案化进行了优化参数的实验。实测电压相关效率的变化趋势与仿真结果吻合较好。该方法可用于优化具有交替TN和PA区域的LC光栅的性能，并在相应的光子学和显示应用中显示出巨大的潜力。(C) 2014年美国光学学会
Electro-optical properties of liquid crystal (LC) gratings with alternate twisted nematic (TN) and planar aligned (PA) regions are simulated. Three typical steps are introduced: first, the LC director distributions of the two different regions are simulated. Then, the phase and amplitude of the emergent light in each region are calculated through Jones matrix. Based on this information, the voltage-dependent diffraction efficiency is achieved by Fourier transformation, finally. It gives an exact explanation for the mechanism of this kind of gratings. Experiments with optimized parameters are carried out through photopatterning. The trend of the measured voltage-dependent efficiency fits the simulation result very well. This method can be used to optimize the performance of LC gratings with alternate TN and PA regions, and exhibits great potential in the simulation of corresponding photonics and display applications. (C) 2014 Optical Society of America