A linear-to-circular polarization converter with broadband transparency based on Huygens’ metasurface

In this work we present the results of numerical simulation and experimental investigation of the Huygens' metasurface providing linear-to-circular polarization conversion. The metasurface is composed of identical modified and paired split-ring resonators. We show, that under certain condition the metasurfaces can operate as linear-to-circular polarizer in two frequency bands having at the same time broadband transparency. An excellent agreement was achieved between simulation and experiment.