Propagation and scattering effects in metastructures based on temporal metamaterials

In this contribution, we present our recent results on the study of the propagation and design of the scattering response exhibited by a temporal metamaterial, i.e. artificial material whose electromagnetic properties are suddenly and dynamically changed over time. We focus our attention on the temporal counterparts of conventional dielectric slabs and multilayered structures. The first is realized through two sudden media switching during the propagation of the wave, which enables a scattering response like the one exhibited by a conventional spatial dielectric slab. In case of more than two switchings, we realize the temporal counterpart of a multilayered structures. We demonstrate that by properly selecting the application time of each media realizing the temporal metamaterial, it is possible to design several types of optical and electromagnetic devices exploiting the temporal dimension instead of the spatial one.