Frequency-modulated continuous waves controlled by space-time-coding metasurface with nonlinearly periodic phases

作     者：Jun Chen Ke Jun Yan Dai Jun Wei Zhang Zhanye Chen Ming Zheng Chen Yunfeng Lu Lei Zhang Li Wang Qun Yan Zhou Long Li Jin Shan Ding Qiang Cheng Tie Jun Cui Jun Chen Ke;Jun Yan Dai;Jun Wei Zhang;Zhanye Chen;Ming Zheng Chen;Yunfeng Lu;Lei Zhang;Li Wang;Qun Yan Zhou;Long Li;Jin Shan Ding;Qiang Cheng;Tie Jun Cui

作者机构：Institute of Electromagnetic SpaceSoutheast University210096 NanjingChina State Key Laboratory of Millimeter WavesSoutheast University210096 NanjingChina School of Electronic EngineeringXidian University710071 Xi'anChina 

出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)

年 卷 期：2022年第11卷第10期

页      面：2424-2434页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 0702[理学-物理学] 

基　　金：This work was supported by the Basic Scientific Center of Information Metamaterials of the National Natural Science Foundation of China(6228810001) the National Key Research and Development Program of China(2017YFA0700201,2017YFA0700202,2017YFA0700203,and 2018YF A0701904) the National Natural Science Foundation of China(61722106 and 61731010) the Major Project of Natural Science Foundation of Jiangsu Province(BK20212002) the 111 Project(111-2-05) the China Postdoctoral Science Foundation(2020M680062) 

主　　题：nonlinear continuous periodic 

摘      要：The rapid development of space-time-coding metasurfaces(STCMs)offers a new avenue to manipulate spatial electromagnetic beams,waveforms,and frequency spectra simultaneously with high *** date,most studies are primarily focused on harmonic generations and independent controls of finite-order harmonics and their spatial waves,but the manipulations of continuously temporal waveforms that include much rich frequency spectral components are still limited in both theory and experiment based on ***,we propose a theoretical framework and method to generate frequency-modulated continuous waves(FMCWs)and control their spatial propagation behaviors simultaneously via a novel STCM with nonlinearly periodic *** the carrier frequency of FMCW changes with time rapidly,we can produce customized time-varying reflection phases at will by the required FMCW under the illumination of a monochromatic *** importantly,the propagation directions of the time-varying beams can be controlled by encoding the metasurface with different initial phase gradients.A programmable STCM prototype with a full-phase range is designed and fabricated to realize reprogrammable FMCW functions,and experimental results show good agreement with the theoretical analyses.