Multi-band asymmetric transmissions based on bi-layer windmill-shaped metamaterial  

作　　者：Ying-Hua Wang Jie Li Zheng-Gao Dong Yan Li Xu Zhang 王英华;李杰;董正高;李妍;张旭(School of Physics and Physical Engineering,Shandong Provincial Key Laboratory of Laser Polarization and Information Technology,Qufu Normal University,Qufu 273165,China;Gr¨unberg Research Centre,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;School of Physics,Southeast University,Nanjing 211189,China)

机构地区：[1]School of Physics and Physical Engineering,Shandong Provincial Key Laboratory of Laser Polarization and Information Technology,Qufu Normal University,Qufu 273165,China [2]Gr¨unberg Research Centre,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [3]School of Physics,Southeast University,Nanjing 211189,China

出　　处：《Chinese Physics B》2021年第11期389-394,共6页中国物理B（英文版）

基　　金：Project supported by the National Youth Foundation of China(Grant Nos.11904200 and 11704219);the National Natural Science Foundation of China(Grant No.11774053);the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20190726);the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(Grant No.18KJD140004);NJUPT-SF(Grant No.NY218099);the Opening Project of the Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology(Grant No.hxkj2019007).

摘　　要：This study proposes a bi-layer windmill-shaped metamaterial that consists of resonators, with similar shapes, on both sides of a dielectric substrate. In this study, the second layer is rotated clockwise around the substrate normal at 90°and thereafter flipped in the first layer. Due to the introduction of a windmill-like shape, the resonant structures result in new resonant modes and thus can achieve multi-band high-efficiency cross-polarization conversions and asymmetric transmissions(ATs) for a linearly polarized incident plane wave with a maximum asymmetric parameter of 0.72. Depending on the geometric parameters of our windmill-shaped structures, the AT effects can be flexibly modulated in a broad multiband from 160 THz to 400 THz, which has not been reported in previous studies. These outstanding AT effects provide potential applications in optical diodes, polarization control switches, and other nano-devices.

关 键 词：METAMATERIAL MULTI-BAND asymmetric transmission polarization conversion 

分 类 号：TB34[一般工业技术—材料科学与工程]