Phase-Gradient Metasurfaces Based on Local Fabry–Perot Resonances

作     者：Yanyan Cao Bocheng Yu Yangyang Fu Lei Gao Yadong Xu 曹燕燕;余博丞;伏洋洋;高雷;徐亚东

作者机构：School of Physical Science and TechnologySoochow UniversitySuzhou 215006China College of ScienceNanjing University of Aeronautics and AstronauticsNanjing 211106China 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2020年第37卷第9期

页      面：95-100页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.11974010,11604229 and 11774252) the Natural Science Foundation of Jiangsu Province(Grant Nos.BK20161210 and BK20171206) the China Postdoctoral Science Foundation(Grant No.2018T110540) the Qinglan Project of Jiangsu Province of China(Grant No.BRA2015353) the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions 

主　　题：filled dielectric surfaces 

摘      要：In this work,we present a new mechanism for designing phase-gradient metasurfaces(PGMs)to control an electromagnetic wavefront with high ***,we design a transmission-type PGM,formed by a periodic subwavelength metallic slit array filled with identical dielectrics of different *** is found that when Fabry-Perot(FP)resonances occur locally inside the dielectric regions,in addition to the common phenomenon of complete transmission,the transmitted phase differences between two adjacent slits are exactly the same,being a nonzero *** local FP resonances ensure total phase shift across a supercell,fully covering a range of 0 to 2π,satisfying the design requirements of *** research reveals that,due to local FP resonances,there is a one-to-one correspondence between the phase difference and the permittivity of the filled dielectric.A similar approach can be extended to the reflection-type case and other wavefront transformations,creating new opportunities for wave manipulation.