Nonlinear nonlocal metasurfaces

Abstract Nonlinear metasurfaces have been enabling unprecedented control over light generation and wave mixing, demonstrating enhanced wavefront control, beam shaping and steering of nonlinear light waves. However, the design and operation of nonlinear metasurfaces have been for the most part limited to localized modes, fundamentally limiting the overall nonlinearity enhancement of such devices. Periodic structures supporting extended lattice resonances can realize much larger quality-factor res