向列相液晶中光诱导分子重取向过程的弛豫时间

刘金龙; 郭旗; 任占梅

doi:10.3788/YJYXS20132806.0833

您当前的位置：

首页 >

文章列表页 >

向列相液晶中光诱导分子重取向过程的弛豫时间

材料物理与化学 | 更新时间：2020-08-12

- 向列相液晶中光诱导分子重取向过程的弛豫时间
- Relaxation of Optical Induced Molecular Reorientation in Nematic Liquid Crystals
- 液晶与显示 2013年28卷第6期页码：833-836
- 作者机构：
  
  1. 华南师范大学广东省微纳光子功能材料与器件重点实验室, 广东广州 510631
  2. 华南农业大学理学院, 广东广州 510642
- 作者简介：
- 基金信息：
  
  国家自然科学基金（No 11274125，No.11074080）();广东省自然科学基金（No.S2012010009178）()
- DOI：10.3788/YJYXS20132806.0833
  中图分类号： O753
- 收稿日期：2013-08-29，
  
  修回日期：2013-09-30，
  
  纸质出版日期：2013-12-15
- 稿件说明：
移动端阅览
刘金龙, 郭旗, 任占梅. 向列相液晶中光诱导分子重取向过程的弛豫时间[J]. 液晶与显示, 2013,28(6): 833-836

LIU Jin-long, GUO Qi, REN Zhan-mei. Relaxation of Optical Induced Molecular Reorientation in Nematic Liquid Crystals[J]. , 2013,28(6): 833-836
刘金龙, 郭旗, 任占梅. 向列相液晶中光诱导分子重取向过程的弛豫时间[J]. 液晶与显示, 2013,28(6): 833-836 DOI： 10.3788/YJYXS20132806.0833.

LIU Jin-long, GUO Qi, REN Zhan-mei. Relaxation of Optical Induced Molecular Reorientation in Nematic Liquid Crystals[J]. , 2013,28(6): 833-836 DOI： 10.3788/YJYXS20132806.0833.

摘要

研究了带偏置电压的向列相液晶盒结构中在激光脉冲作用下的分子转动动力学模型。结果表明，入射光脉冲的宽度远大于1 ps时，光脉冲诱导液晶分子重取向过程可用德拜弛豫过程描述。弛豫时间常数与液晶盒厚度的平方成正比，和液晶的弹性常数成反正。弛豫时间常数依赖于液晶横向位置，预偏角的范围在0~0.4 rad之间变化时，不同位置的时间常数相差较大，可在一个量级之间变化；预偏角在0.4~/2 rad时，时间常数基本不变。弛豫时间常数还受偏置电压控制，1.2~10 V偏置电压时液晶盒中心处的弛豫时间常数在10 ms~10 s变化，变化范围可达3个数量级。

Abstract

The molecular reorientation transient process induced by laser pulse in nematic liquid crystals (NLC) with bias voltage is explored. The results show that if the width of pulse is large more than 1 ps

the molecular reorientation transient process induced by the pulse can be modeled as Debye relaxation process

the relaxation time constant is inversely proportional to the elasticity constant of NLC

and is proportional to the square of thick of the cell. On one hand

the relaxation time constant is transversely dependent

for the pretilted angle varied in 0~0.4 rad

the relaxation time constant can be varied in one order of magnitude

for the case of pretilted angle is more than 0.4 rad

the time constant remains the same. On the other hand

the relaxation time constant can be steered by bias voltage

reorientation relaxation time ranges from 10 ms~10 s can be obtained if the 1.2~10 V bias voltage is applied to the cell.

关键词

Keywords

references

Assanto Gaetano, Pecciant Marco.Spatial solitons in nematic liquid crystals [J].IEEE J. Quantum Electron,2003,39(1):13-21.[2] Hu W,Zhang T, Guo Q.Nonlocality-controlled interation of spatial solitons in nematic liquid crystals [J].Appl. Phys. Lett.,2006,89(7):071111(1-3).[3] Khoo Iam-Choon.Optically-Induced molecular reorientation in nematic Liquid crystals and nonlinear optical processes in the nanosecond regime [J].IEEE J. Quantum Electron,1987,QE-23(2):267-272.[4] Hsiung H, Shi L P, Shen Y R.Transient laser-induced molecular reorientation and laser heating in a nematic liquid crystal [J].Phys. Rev. A,1984,30(3):1453-1460.[5] Khoo Iam-Choon.Liquid Crystal:Physical Properties and Nonlinear Optical Phenomena [M].New York:John Wiley & Sons, Inc,1995:61-65.[6] Residori S, Bortolozzo U, Huignard J P.Slow and fast light in liquid crystal light valves [J].Phys. Rev. Lett.,2008,100(20)(203603):1-4.[7] Yang Qiguang,Seo Jae Tae, Tabibi Bagher.Slow light and superluminality in kerr media without a pump [J].Phys. Rev. Lett.,2005,95(6):063902(1-4).[8] Conti Claudio,Peccianti Marco, Assanto Gaetano.Route to nonlocality and observation of accessible solitons [J].Phys. Rev. Lett.,2003,91(7):07390(1-4).[9] Deuling H J.Deformation of nematic liquid crystals in an electric field [J].Mol. Cryst. Liq. Cryst.,1972,19(2):123-131.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

暂无数据