Double-groove rectangular gratings for high-efficiency wideband vertical coupling in planar-integrated optical systems  

作　　者：Guoqing Ma Changhe Zhou Yongfang Xie Ge Jin Rongwei Zhu Jin Zhang Junjie Yu Guohai Situ 马国庆;周常河;谢永芳;金戈;朱镕威;张瑾;余俊杰;司徒国海(Laboratory of Information Optics and Optoelectronic Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Photonics Technology,Jinan University,Guangzhou 510000,China)

机构地区：[1]Laboratory of Information Optics and Optoelectronic Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences,Shanghai 201800,China [2]Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences,Beijing 100049,China [3]Institute of Photonics Technology Jinan University,Guangzhou 510000,China

出　　处：《Chinese Optics Letters》2022年第9期1-7,共7页中国光学快报（英文版）

基　　金：supported by the Shanghai Science and Technology Committee(Nos.19JC1415400,19DZ1191102,and 20ZR1464700);in part by the Cutting-Edge Sciences Important Research Program,Bureau of Frontier Sciences and Education,Chinese Academy of Sciences(No.QYZDJSSW-JSC014)。

摘　　要：A planar-integrated optical system(PIOS)represents powerful optical imaging and information processing techniques and is a potential candidate for the realization of a three-dimensional(3D)integrated optoelectronic intelligent system.Coupling the optical wave carrying information into a planar transparent substrate(typically fused silica)is an essential prerequisite for the realization of such a PIOS.Unlike conventional grating couplers for nano-waveguides on the silicon-on-insulator platform,the grating couplers for PIOS enable to obtain a higher design freedom and to achieve much higher coupling efficiency.By combining the rigorous coupled wave algorithm and simulated annealing optimization algorithm,a highefficiency asymmetric double-groove grating coupler is designed for PIOS.It is indicated that,under the condition of the normal incidence of TE polarization,the diffraction efficiency of the-1st order is over 95%,and its average value is 97.3%and 92.8%in the C and C+L bands.The simulation results indicate that this type of grating coupler has good tolerance and is expected to be applied in optical interconnections,waveguide-based augmented reality glasses,and planar-integrated 3D interconnection optical computing systems.

关 键 词：double-groove grating vertical coupling planar integration optical computing 

分 类 号：TN256[电子电信—物理电子学]