Broadband Performance of Janus Backscattering in Tilted Dipolar Array

Metasurfaces have attracted substantial attention in recent years due to the ability for the versatile manipulation of electromagnetic (EM) wave. Recently, Janus backscattering mirrors that retroreflect incident waves for one side while show transparency in the time-reversed reflection channel have been discussed. Here, the dependence of the broadband performance on the geometry parameters and the angles are investigated. The numerical simulated results validate that the bandwidth and the efficiency depend on geometry parameters, especially the tilted angle and incident angle.