High-reflectivity high-contrast grating focusing reflector on silicon-on-insulator wafer
Fang Wenjing1, 2, Huang Yongqing1, 2, †, , Duan Xiaofeng1, 2, Liu Kai1, 2, Fei Jiarui1, 2, Ren Xiaomin1, 2
       

The setup used to test the HCG structure with focusing ability.