Angle-insensitive Huygens’ metasurfaces of quadrupole modes

Metasurfaces have attracted widespread interest owing to their ability to control light at the nanoscale level. However, the optical response of dipole mode-based metasurfaces is sensitive to changes in the resonator period and the light incidence angle; thus, the device performance typically degrades in practical applications owing to the presence of non-normal incident light. Here, we study cross-shaped Mie resonators based on quadrupole modes, whose optical response is almost independent of the variations in period and incidence angle. Based on this property of quadrupole modes, we propose a Huygens’ metasurface with stable transmissivity at different incident angles.