Characteristics of Higher-Order Diffraction Image Based on Photorefractive Grating in Nematic Liquid Crystals

LAN Min; REN Chang-yu

doi:10.3788/YJYXS20112604.0443

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Characteristics of Higher-Order Diffraction Image Based on Photorefractive Grating in Nematic Liquid Crystals

Material Physics & Chemistry | 更新时间：2020-08-12

- Characteristics of Higher-Order Diffraction Image Based on Photorefractive Grating in Nematic Liquid Crystals
- Chinese Journal of Liquid Crystals and Displays Vol. 26, Issue 4, Pages: 443-447(2011)
- 作者机构：
  
  1. 长春工业大学基础科学学院, 吉林长春 130012
  2. 黑龙江科技学院理学院, 黑龙江哈尔滨 150027
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20112604.0443
  CLC： O753+.2
- Received：28 February 2010，
  
  Revised：11 April 2011，
  
  Published Online：20 August 2011，
  
  Published：20 August 2011
- 稿件说明：
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兰民, 任常愚. 向列相液晶中高阶衍射图像的特性[J]. 液晶与显示, 2011,26(4): 443-447

LAN Min, REN Chang-yu. Characteristics of Higher-Order Diffraction Image Based on Photorefractive Grating in Nematic Liquid Crystals[J]. , 2011,26(4): 443-447
兰民, 任常愚. 向列相液晶中高阶衍射图像的特性[J]. 液晶与显示, 2011,26(4): 443-447 DOI： 10.3788/YJYXS20112604.0443.

LAN Min, REN Chang-yu. Characteristics of Higher-Order Diffraction Image Based on Photorefractive Grating in Nematic Liquid Crystals[J]. , 2011,26(4): 443-447 DOI： 10.3788/YJYXS20112604.0443.

摘要

研究了垂直排列C

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。

Abstract

The characteristics of the higher-order diffraction images of a photorefractive grating recorded in cells of homeotropically aligned nematic liquid crystal (5CB) doped with sensitizer C

were studied. In two-beam coupling (TBC) experiments

one incident signal beam is interfered with a mutually coherent reference beam within the sample at a small incident angle and the photorefractive 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.

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references

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