Innovative Inverse-Design Approach for On-Chip Computational Spectrometers:Enhanced Performance and Reliability  

作　　者：Ang Li Yifan Wu Gongyuan Zhang Chang Wang Jijun He Yaqi Shi Zongyin Yang Shilong Pan 

机构地区：[1]National Key Laboratory of Microwave Photonics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]College of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310058,China [3]Key Laboratory of Modern Optical Technologies of Ministry of Education of the People’s Republic of China,Soochow University,Soochow 215131,China

出　　处：《Engineering》2024年第12期81-88,共8页工程(英文)

基　　金：supported by National Key Research and Development Program of China(2021YFB2801500,2022YFB3206001,and 2023YFB3405600);National Natural Science Foundation of China(62375126,62105149,and 62334001);the Leading Innovation and Entrepreneurship Team Project in Zhejiang(2022R01001);Key Laboratory of Modern Optical Technologies of Education Ministry of China,Soochow University;State Key Laboratory of Advanced Optical Communication Systems and Networks,China。

摘　　要：Computational spectrometers utilizing disordered structures have emerged as promising solutions for meeting the imperative demand for integrated spectrometers,offering high performance and improved resilience to fabrication variations and temperature fluctuations.However,the current computational spectrometers are impractical because they rely on a brute-force random design approach for disordered structures.This leads to an uncontrollable,non-reproducible,and suboptimal spectrometer performance.In this study,we revolutionize the existing paradigm by introducing a novel inverse design approach for computational spectrometers.By harnessing the power of inverse design,which has traditionally been applied to optimize single devices with simple performance,we successfully adapted it to optimize a complex system comprising multiple correlated components with intricate spectral responses.This approach can be applied to a wide range of structures.We validated this by realizing a spectrometer utilizing a new type of disordered structure based on interferometric effects that exhibits negligible loss and high sensitivity.For a given structure,our approach yielded a remarkable 12-times improvement in the spectral resolution and a four-fold reduction in the cross-correlation between the filters.The resulting spectrometer demonstrated reliable and reproducible performance with the precise determination of structural parameters.

关 键 词：Silicon photonics Integrated spectrometers Inverse design 

分 类 号：O17[理学—数学]