摘要
本文利用基于光束传播方法的有限元仿真模型研究了氮化镓(GaN)平面光波导的传输损耗特性,并针对传统GaN波导损耗较大的问题提出了工艺优化方案。通过构建完整的传输损耗模型,系统分析了波导几何参数对传输特性的影响,重点研究了...展开更多
本文利用基于光束传播方法的有限元仿真模型研究了氮化镓(GaN)平面光波导的传输损耗特性,并针对传统GaN波导损耗较大的问题提出了工艺优化方案。通过构建完整的传输损耗模型,系统分析了波导几何参数对传输特性的影响,重点研究了顶部刻蚀和背后减薄两种优化工艺的改善效果。研究结果表明,这两种工艺均可显著降低波导传输损耗。其中顶部刻蚀工艺和背后减薄工艺可将损耗从2.29 dB/mm分别降至0.19 dB/mm和0.24 dB/mm。此外,本文还量化分析了制造工艺引入的侧壁夹角和表面粗糙度等缺陷对传输损耗的影响,并通过参数优化确定了实现可见光单模传输的关键结构尺寸。本文研究成果为设计和制备低损耗GaN平面光波导提供了理论依据和工艺指导。收起
In this paper,we investigate the transmission loss characteristics of gallium nitride(GaN)planar optical waveguides using a finite element simulation model based on the beam propagation method(BPM).To address the high transmission loss in conventional GaN waveguides,we ...MORE
In this paper,we investigate the transmission loss characteristics of gallium nitride(GaN)planar optical waveguides using a finite element simulation model based on the beam propagation method(BPM).To address the high transmission loss in conventional GaN waveguides,we propose process optimization solutions.By constructing a comprehensive transmission loss model,we systematically analyze the impact of waveguide geometric parameters on the transmission characteristics,with a particular focus on investigating the improvement effects of two optimization processes:top etching and back thinning.The experiment results indicate that both processes significantly reduce the waveguide transmission loss,with the top etching process reducing loss from 2.29 dB/mm to 0.19 dB/mm and the back thinning process reducing it to 0.24 dB/mm.Additionally,we analyze the impact of manufacturing defects,such as sidewall angles and sur-face roughness,on transmission loss.Through parameter optimization,we identify the key dimensions neces-sary for single mode light transmission.This study provides a theoretical basis and process guidance for the development of low-loss GaN waveguides.FEWER
作者
尹慧萍
李文迪
冯萧萧
秦飞飞
施政
王永进
李欣
YIN Hui-ping;LI Wen-di;FENG Xiao-xiao;QIN Fei-fei;SHI Zheng;WANG Yong-jin;LI Xin(School of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)
出处
《中国光学(中英文)》
EI
CAS
CSCD
北大核心
2025年第3期477-486,共10页
Chinese Optics
基金
国家自然科学基金(No.62274096,No.62204127)
江苏省高等学校基础科学(自然科学)研究重大项目(No.22KJA510003)
江苏省自然科学基金(No.BK20210593)。
关键词
氮化镓光波导
可见光通信
传输损耗
工艺优化
单模传输
GaN optical waveguide
visible light communication
transmission loss
process optimization
single mode transmission