Anisotropic and nonlinear metasurface for multiple functions
Anisotropic and nonlinear metasurface for multiple functions作者机构：State Key Laboratory of Millimeter Waves School of Information Science and EngineeringSoutheast University Pazhou Lab Air and Missile Defense College Air Force Engineering University
出 版 物：《Science China(Information Sciences)》 (中国科学:信息科学(英文版))
年 卷 期：2021年第64卷第9期
页 面：165-174页
核心收录：
学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：supported by National Natural Science Foundation of China (Grant No. 61801117),International Cooperation and Exchange of National Natural Science Foundation of China (Grant No. 61761136007) Fundamental Research Funds for the Central Universities (Grant No. 2242021R10109) National Key Research and Development Program of China (Grant Nos. 2017YFA0700201, 2017YFA0700202, 2017YFA0700203) the 111 Project (Grant No. 111-2-05) Zhishan Young Scholar Program Zijin Scholar Program of Southeast University
主 题：multi-function metasurface nonlinear anisotropic polarization
摘 要：We present a novel anisotropic and nonlinear metasurface integrated with multiple functions of diffuse scattering, beam splitting, and normal reflection, which can be switched in real time by tuning the polarization state or power level of the incident microwave. The key lies in the two judiciously designed anisotropic nonlinear particles in subwavelength scales that possess opposite reflection phases under one polarization and the same nonlinear power-dependent reflection phases under the orthogonal polarization. These properties are demonstrated comprehensively via comparisons between their reflection responses, receiving abilities, and nonlinear circuitry behaviors. In addition, both the spatial arrangement and the electrically enabling strategy of the particles are underpinned to pursue the proposed functions, which are verified through numerical simulations and measurements. When the metasurface is illuminated by plane waves coming from the direction perpendicular to it, a significant beam splitting effect is achieved with strong x-polarized incidence,which is switched to a specular reflection when the incoming power decreases. Under y-polarization,a diffuse scattering phenomenon is obtained, which is not dependent on the incident intensity. The study is expected to offer new solutions to many electromagnetic scenarios involving energy transmissions and protections.
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