Salient Features of Space-Time Metastructures

Space-Time metamaterials are a family of engineered structures in which some of the materials parameters can change in time instead of (or in addition to) changing in space. Such four-dimensional metastructures offer exciting possibilities for light-matter interaction. In this talk, I will present some of our most recent results in this topic, and will discuss some of their salient features with potential applications in temporal imaging, temporal beaming, nonreciprocity, and temporal deflections. Some of the fundamental aspects of wave interaction with such media, such as causality, and temporal and spatial dispersions for temporal and spatial boundary conditions will be highlighted. Physical insights into our findings will also be presented.