High-efficiency multi-wavelength metasurface with complete independent phase control  

作　　者：Jing Yan Yinghui Guo Mingbo Pu Xiong Li Xiaoliang Ma Xiangang Luo 严璟;郭迎辉;蒲明博;李雄;马晓亮;罗先刚(State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China [2]University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Optics Letters》2018年第5期7-11,共5页中国光学快报（英文版）

基　　金：supported by the 973 Program of China(No.2013CBA01700);the National Natural Science Foundation of China(No.61575201)

摘　　要：As a consequence of Kramers–Kronig relations, the wavelength-dependent behavior of the metasurface is one of the critical limitations in existing metasurface structures, which reduces the design freedom among different wavelengths. Here, we present an approach to construct a high-efficiency multi-wavelength metasurface with independent phase control by coding different wavelengths into orthogonal polarizations. As proof of the concept, two dual-band metasurfaces have been proposed and numerically demonstrated by multiple vortex beam generation in near-field and polarization multiplexing achromatic beam deflection. Furthermore, simulated results show that the proposed metasurface exhibits high transmission efficiency at both wavelengths, which may find widespread applications in subwavelength electromagnetics.As a consequence of Kramers–Kronig relations, the wavelength-dependent behavior of the metasurface is one of the critical limitations in existing metasurface structures, which reduces the design freedom among different wavelengths. Here, we present an approach to construct a high-efficiency multi-wavelength metasurface with independent phase control by coding different wavelengths into orthogonal polarizations. As proof of the concept, two dual-band metasurfaces have been proposed and numerically demonstrated by multiple vortex beam generation in near-field and polarization multiplexing achromatic beam deflection. Furthermore, simulated results show that the proposed metasurface exhibits high transmission efficiency at both wavelengths, which may find widespread applications in subwavelength electromagnetics.

关 键 词：High-efficiency multi-wavelength metasurface with complete independent phase control 

分 类 号：TB30[一般工业技术—材料科学与工程]