液晶与显示2024，Vol.39Issue(4)：427-435,9.DOI:10.37188/CJLCD.2024-0048
应用于彩色光波导显示中的液晶偏振体光栅结构设计与制备
Design and fabrication of liquid crystal polarizing grating used in color optical waveguide display
摘要
Abstract
In this paper,a three-layer liquid crystal polarization grating is designed and implemented,and its diffraction characteristics and coupling in optical waveguide are studied.In theory,the transverse period of 424 nm is selected,and the corresponding three longitudinal periods is calculated according to the specific working wavelength of 450 nm,532 nm and 633 nm to achieve the superposition of the thickness direction under the condition of Bragg diffraction.Secondly,the finite element method is used to simulate the device.Finally,the relationship between the incident angle and the diffraction angle coupled in the waveguide is simulated according to the red,green and blue light dispersion relationship.The liquid crystal polarization grating device is fabricated and its system performance is characterized.A preliminary optical waveguide coupling experiment is given to demonstrate its coupling effect.The results show that the diffraction efficiency of the prepared three-layer liquid crystal polarization grating device can reach more than 80%at 450 nm,532 nm and 633 nm,and the angular bandwidth of the corresponding wavelength is 12°,8° and 6°,respectively.The field of view of the device coupled in the waveguide can reach 27.81° by simulation,which is a good optical waveguide coupler.关键词
光学器件/角度响应/衍射效率/液晶偏振体光栅Key words
optical devices/angular response/diffraction efficiency/liquid crystal polarizer grating分类
数理科学引用本文复制引用
阚丽娜,穆全全,彭增辉,杨程亮,于洋,刘永刚,王启东..应用于彩色光波导显示中的液晶偏振体光栅结构设计与制备[J].液晶与显示,2024,39(4):427-435,9.基金项目
国家自然科学基金(No.U2241224,No.11974345,No.61975202,No.U2030101)Supported by National Natural Science Foundation of China(No.U2241224,No.11974345,No.61975202,No.U2030101) （No.U2241224,No.11974345,No.61975202,No.U2030101）
