Salient Features of Four-Dimensional Metastructures

In recent years, there has been renewed attention and growing interest in time-varying material structures while waves are present in them. Such temporal media can also include spatial inhomogeneities. These four-dimensional (4D) metamaterials offer exciting and intriguing possibilities and additional degrees of freedom in manipulating and sculpting light. Exploring such space-time tailoring of waves in electromagnetic metamaterials provides new venues for controlling functionalities in light-matter interaction. We have been investigating several scenarios for waves in such 4D metamaterials and have obtained various novel features that can provide potential applications in wave-based devices and components. I will present some of our most recent results on these topics in this presentation.