激光与光电子学进展, 2020, 57 (13): 132304, 网络出版: 2020-07-09
基于Goos-Hänchen位移的保偏角锥棱镜设计 下载: 992次
Design of Polarization Preserving Corner-Cube Reflector Based on Goos-Hänchen Displacement
光学器件 角锥棱镜 COMSOL Multiphysics 倏逝波 粒子群算法 optical devices corner-cube reflector COMSOL Multiphysics evanescent wave particle swarm optimization
摘要
提出一种通过光学隧穿效应调控Goos-H?nchen位移实现相位可控的保偏方案。首先研究在角锥棱镜反射面外侧镀上两层介质膜(膜1和膜2);然后使用粒子群优化(PSO)算法优化介质膜的折射率和厚度,使入射光在角锥棱镜-膜1界面上发生全内反射,倏逝波经由膜2返回角锥棱镜,利用反射光束与倏逝波的叠加效应改变传播光束的相位进而实现保偏;最后,利用COMSOL Multiphysics软件仿真镀膜角锥棱镜的保偏效果。结果表明,当线偏振光的初始入射方位角在[-40°,40°]范围时,所设计的角锥模型具有较好的偏振效果,出射光的方位角和椭圆率分别变化约0.2°和0。
Abstract
This paper proposes a phase-controllable polarization-preserving scheme by adjusting Goos-H?nchen displacement based on the optical tunneling effect. First, two dielectric films (i.e., films 1 and 2) are coated outside a corner-cube reflector's reflective plane. Then, the refractive index and thickness of the dielectric film are optimized through particle swarm optimization (PSO) method to realize the incident light, which can be totally reflected at the interface of the corner-cube reflector and the dielectric film. The evanescent wave returns to the corner-cube reflector through the film 2. The polarization preservation can be achieved using the superposition effect of the reflected beam and the evanescent wave to change the propagating beam phase. Finally, COMSOL Multiphysics simulation software is used to simulate the polarization preservation effect of the corner-cube reflector. Simulation results show that when the initial azimuth of the incident polarized light is in the range of [-40°,40°], it exhibits better preserved polarization, i.e., the azimuth angle and the ellipticity of the emitted light are varied by approximately 0.2° and 0, respectively.
谢莉莎, 黄春晖. 基于Goos-Hänchen位移的保偏角锥棱镜设计[J]. 激光与光电子学进展, 2020, 57(13): 132304. Lisha Xie, Chunhui Huang. Design of Polarization Preserving Corner-Cube Reflector Based on Goos-Hänchen Displacement[J]. Laser & Optoelectronics Progress, 2020, 57(13): 132304.