Inverse design of quasi-bound states in the continuum metasurface for the polarization independent enhancement of Goos-H?nchen shift  

作　　者：Zuhai Ma Youzhi Shi Yu Chen Yu Xue Gan Wan Chi Zhang Hui Jing Le-Man Kuang Xinxing Zhou 

机构地区：[1]Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,School of Physics and Electronics,Hunan Normal University,Changsha 410081,China [2]International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology,Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province,Institute of Microscale Optoelectronics,Shenzhen University,Shenzhen 518060,China [3]Key Laboratory of Physics and Devices in Post-Moore Era,College of Hunan Province,Changsha 410081,China [4]Academy for Quantum Science and Technology,Zhengzhou University of Light Industry,Zhengzhou 450002,China [5]Institute of Interdisciplinary Studies,Hunan Normal University,Changsha 410081,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2024年第12期79-86,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12374273,12421005,62271332,and 62275162);Training Program for Excellent Young Innovators of Changsha(Grant No.kq2107013);Guangdong Basic and Applied Basic Research Foundation(Grant No.2023A1515030152);Shenzhen Government’s Plan of Science and Technology(Grant Nos.JCYJ20180305124927623,and JCYJ20190808150205481);Hunan Provincial Major Sci-Tech Program(Grant No.2023ZJ1010)。

摘　　要：Bound states in the continuum(BIC)have been widely researched and applied in optics due to their unique electromagnetic response.However,there are still difficulties in predicting and customizing BIC spectra.To address this issue,we design an efficient combined neural network for highly accurate prediction of quasi-bound states in the continuum(q-BIC)spectrum,as well as for the inverse design of the polarization independent enhancement of the Goos-H?nchen(GH)shift.Firstly,we propose a C_(4)symmetric metasurface for achieving q-BIC spectrum and providing the condition of enhanced GH shift.By employing a combined neural network,the intensity,position,shape,and phase of q-BIC spectrum with ultra-narrow resonance can be accurately predicted and on-demand customized,even under a small dataset.Besides,we develop a screening algorithm for the q-BIC spectrum to quickly realize the polarization independent enhancement of GH shift.As an application,an ultra-high sensitivity refractive index sensor has been proposed,whose sensitivity can reach 2.31×10~7μm/RIU for TM polarization and 1.03×10~6μm/RIU for TE polarization.Therefore,this work brings new solutions for quick prediction of q-BIC spectrum and the development of flexible polarization photonic devices.

关 键 词：Goos-Hanchen shift bound states in the continuum deep learning 

分 类 号：O436.3[机械工程—光学工程] TP18[理学—光学]