Fig. 1: Effect of the interactions between nanoresonators on the amplitude and phase of the transmitted light.
From: Inverse design of metasurfaces with non-local interactions
FDTD simulation results of the transmission and phase shift experienced by a uniform wavefront of light after propagation through a homogeneous and periodic nanoresonator array (circular TiO2 nanodiscs on glass substrate and embedded in HSQ medium). Square arrays: a transmission and b phase shift as a function of the disc radius and edge-to-edge gap; c transmission and phase for a resonator library with constant pitch of 310 nm and varying disc radius (following the path marked by white dashed lines in a, b). Hexagonal arrays: d transmission and e phase shift as a function of the disc radius and edge-to-edge gap; f transmission and phase for the same library with constant pitch (310 nm) and varying disc radius in hexagonal arrangement. The insets in c, f show the side views of the electric energy density in a resonator array (pitch 310 nm, radius 125 nm) for square and hexagonal arrangements, respectively.
