Polarization-independent silicon photonic grating coupler for large spatial light spots  

作　　者：Lijun Yang Xiaoyan Hu Bin Li Jing Cao 杨丽君;胡小燕;李斌;曹静(Information Science Academy of China Electronics Technology Group Corporation,Beijing 100086,China)

机构地区：[1]Information Science Academy of China Electronics Technology Group Corporation,Beijing 100086,China

出　　处：《Chinese Physics B》2021年第2期308-312,共5页中国物理B（英文版）

基　　金：Project supported by the National High Technology Research and Development Program of China(Grant No.18-H863-04-ZD-006-007-01)。

摘　　要：We design and demonstrate a one-dimensional grating coupler with a low polarization-dependent loss(PDL)for large spatial light spots.Based on current fabrication conditions,we first utilize genetic algorithms to find the optimal grating structure including the distributions of duty and periods,making the effective refractive index of transverse electric mode the same as that of transverse magnetic mode.The designed grating coupler is fabricated on the common silicon-on-insulator platform and the PDL is measured to be within 0.41 d B covering the C-band.

关 键 词：silicon photonics grating coupler polarization-dependent loss 

分 类 号：TN622[电子电信—电路与系统] O439[机械工程—光学工程]