Bistable Non-reciprocal Transmission of a Nonlinear Metal-Dielectric Metasurface in Wood's Anomaly

In this paper, a nonlinear metasurface based on a thin metal-dielectric grating with Kerr type nonlinear elements is proposed. This kind of the metasurface can manifest high-Q lattice modes resonances when varying the incident wavelength to explore the unique electromagnetic modes of Wood's anomalies. These mode resonances lead to an enhancement of the local field and a substantial boosting of nonlinear effects. The bistable characteristics of the metasurface can be effectively controlled by changing illumination conditions. A non-reciprocal phenomenon of the electromagnetic wave transmission through the grating with the nonlinear elements is observed by numerical simulation.