摘要
研究了垂直排列C60掺杂的向列相液晶(5CB)记录光折变光栅衍射像的特性。利用二波耦合实验,以较小入射角的信号光束与参考光束在样品中干涉并形成光折变光栅。在远离样品的观察屏上可观察到高阶衍射像。对衍射像进行分析发现,信号光一侧的二阶衍射像被放大,而在参考光一侧的负一阶衍射虽没放大,但产生了180°旋转,理论分析与实验观察结果非常吻合。
The characteristics of the higher-order diffraction images of a photorefractive grating recorded in cells of homeotropically aligned nematic liquid crystal （SCB） doped with sensitizer Cs0 were studied. In two-beam coupling （TBC） experiments, one incident signal beam is in terfered with a mutually coherent reference beam within the sample at a small incident angle and the photoreffactive gratings formed. The higher order diffraction images were observed on the screen behind the sample. It was shown that the image corresponding to the second order diffraction image which is located at the side of the signal beam is magnified, and the image corresponding to the negative first order which is located at the side of the reference beam is 180° rotated. The theoretical analyses are in good agreement with the experimental results.
出处
《液晶与显示》
CAS
CSCD
北大核心
2011年第4期443-447,共5页
Chinese Journal of Liquid Crystals and Displays
基金
黑龙江省自然科学基金资助项目(No.A200915)
黑龙江省教育厅科学技术研究资助项目(No.12511493)
关键词
向列相液晶
光折变效应
光栅
衍射图像
nematic liquid crystal
photorefractive effect
grating
diffraction image
