Ultrathin Dual-Polarized Huygens' Metasurface: Design and Application

As a class of transmissive surfaces, Huygens' metasurfaces have attracted much attention in recent years due to their abilities to efficiently manipulate transmitted waves. However, the study of dual-polarized Huygens' metasurfaces using vialess double-layer elements has not yet been reported. To overcome this challenge, herein an ultrathin Huygens' metasurface composed of only double-layer elements without vias is proposed to achieve high transmission and near 360 degrees phase shift for dual polarization. Based on induced magnetism, the top and the bottom elements act as both an electric dipole and a magnetic dipole, inducing the orthogonally electric and magnetic current simultaneously. Then their interaction excites the Huygens' resonance. As an example of an application, a dual-polarized Huygens' meta-lens is prepared that exhibits excellent antenna performance. Dual-polarized Huygens' metasurfaces based on induced magnetism offer extra opportunities for efficient transmitted wave manipulation in metasurfaces.