摘要
基于亚波长光栅的泄漏模共振效应和等效介质理论,利用Comsol Multiphysics软件设计分析了针对1 550nm工作波长的一维悬浮亚波长氮化镓光栅偏振分束器。通过改变光栅的宽度、高度以及周期来确定最终的参数。仿真结果显示,在正入射条件下,该偏振分束器在C波段(1 530~1 565nm)对TE模具有很高的反射率,同时对TM模具有很高的透射率,消光比达到20dB以上,TM模透射率高于98%。
Based on the leaky mode resonance effect and equivalent medium theory of the sub-wavelength grating, a one-dimensional suspension sub-wavelength grating is designed and analyzed by the Comsol Multiphysics software in 1 550 nm wavelength. The final parameters are determined by changing the width, height and period of the grating. The simulation results show that the polarization beam splitter has high reflectivity for the TE mode and high transmittance for TM mode in C band （1 530-1 565 nm） under the condition of normal incidence. The extinction ratios of the splitter are over 20 dB and the trans- missivity of the TM mode is higher than 98%.
出处
《光通信研究》
北大核心
2018年第1期31-32,78,共3页
Study on Optical Communications
基金
国家自然科学基金资助项目(61274121
61574080)
江苏省自然科学基金资助项目(BK2012829)
南京邮电大学人才引进项目(NY212007)
关键词
氮化镓
亚波长光栅
偏振分柬器
泄漏模共振效应
等效介质理论
GaN
sub-wavelength grating
polarizing beam splitter
leaky mode resonance effect
equivalent medium theory
