Relationship of field components in the liquid crystal optical waveguide eigenmode

Zheng-tao ZHA; Qian-shu ZHANG

doi:10.37188/CJLCD.2021-0276

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Relationship of field components in the liquid crystal optical waveguide eigenmode

Device Physicsand Device Preparation | 更新时间：2022-01-19

- Relationship of field components in the liquid crystal optical waveguide eigenmode
- Chinese Journal of Liquid Crystals and Displays Vol. 37, Issue 1, Pages: 14-20(2022)
- 作者机构：
  
  1.西华师范大学物理与天文学院，四川南充 637009
  2.西华师范大学电子信息工程学院，四川南充 637009
- 作者简介：
- 基金信息：
  
  the Scientific Research Foundation of the Science and Technology Department of Sichuan Province, China(2014JY0024);Scientific Research Foundation of the Science and Technology Bureau of Nanchong, China(19YFZJ0090);Talent Scientific Research Foundation of China West Normal University Foundation, China(17YC056)
- DOI：10.37188/CJLCD.2021-0276
  CLC： TN252;O753.2
- Received：30 October 2021，
  
  Revised：26 November 2021，
  
  Published：2022-01
- 稿件说明：
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Zheng-tao ZHA, Qian-shu ZHANG. Relationship of field components in the liquid crystal optical waveguide eigenmode[J]. Chinese journal of liquid crystals and displays, 2022, 37(1): 14-20.
DOI：

Zheng-tao ZHA, Qian-shu ZHANG. Relationship of field components in the liquid crystal optical waveguide eigenmode[J]. Chinese journal of liquid crystals and displays, 2022, 37(1): 14-20. DOI： 10.37188/CJLCD.2021-0276.

摘要

液晶光波导的本征模场分析是其器件设计的基础与理论支撑，模场分析的准确度直接影响到液晶光波导器件性能的好坏。为了准确分析液晶光波导中本征模场分量间的关系，我们执行了以下步骤。首先，根据麦克斯韦方程组推导出向列相液晶的磁场耦合方程，然后得出非寻常光波本征模式的磁场分量间比值与指向矢旋转角间的定量关系，并利用OptiBPM13.1进行数值仿真。仿真结果验证了场分量间比值与指向矢旋转角的正切函数互为相反数这一定量关系。根据这一关系，可通过改变外加电压来控制液晶光波导中本征模场的横向磁场分量间的相对数量级，进而实现非寻常光波所激励的偏振模式的转换。这一规律有助于推动基于液晶光波导的偏振旋转器和模式转换器的研究。

Abstract

The eigenmode analysis of liquid crystal optical waveguides (LCOWs) was the basis and theoretical support for the design of its devices. The accuracy of mode field analysis directly affects the performance of LCOW-based devices. We used the following procedure to accurately analyze the relationship of the eigenmode field components in the LCOW. Firstly

the magnetic field coupling equations of the nematic liquid crystals were obtained from Maxwell's equations. Then

the quantitative relationship between the rotation angle of the liquid crystal director and the ratio of the magnetic field components of the eigenmodes excited by the extraordinary light wave was obtained. Additionally

the numerical simulation is carried out using OptiBPM13.1. The simulation results verify the quantitative relationship that the ratio between field components and the tangent function of director rotation angle are opposite to each other. According to this relationship

the relative order of magnitude between the transverse magnetic field components of the eigenmode field in the LCOW can be controlled by changing the applied voltage. Then

the conversion of polarization mode excited by an extraordinary light wave can be realized. This law is helpful to promote the research of polarization rotator and mode converter based on LCOW.

关键词

Keywords

references

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