Enhancing metasurfaces and metamaterials with time-modulation and nonlinear responses

Metasurfaces and metamaterials have been enabling a new and exciting platform to manipulate the propagation, transmission and reflection of electromagnetic waves, sound, heat, and other wave phenomena. In this talk, I will provide an overview of our recent efforts to enhance metasurfaces and metamaterials by enabling time modulation and giant nonlinearities in their basic inclusions, opening new horizons for metamaterial technology in various fields of science and technology. I will discuss how suitably tailored temporal modulation and nonlinearities may be able to overcome some of the conventional constraints associated with passive, linear and time-invariant metamaterial devices, including bandwidth constraints, reciprocal responses, and the large influence of losses.