The article reviews general properties of time-varying dispersive materials. We first briefly
discuss different dispersion models that have been proposed in the literature, the role of the …

Metamaterials are mostly designed in the time-harmonic scenario where wave propagation
can be spatially manipulated. Tailoring the electromagnetic response of media in time has …

Wave absorption in time-invariant, passive thin films is fundamentally limited by a trade-off
between bandwidth and overall thickness. In this work, we investigate the use of temporal …

Digital programmable metasurfaces provide a very powerful and versatile platform for
implementing spatio‐temporal modulation schemes that are of great interest within the …

In this opinion article, we briefly summarize some of the background materials and recent
developments in the field of temporal and spatiotemporal media and provide our opinion on …

We explore the mathematical theory to rigorously describe the response of media with linear
time-varying, generally dispersive, electromagnetic constitutive parameters. We show that …

We study the problem of a temporal discontinuity in the permittivity of an unbounded medium
with Lorentzian dispersion. More specifically, we tackle the situation in which a …

Invariance under time translation (or stationarity) is probably one of the most important
assumptions made when investigating electromagnetic phenomena. Breaking this …

We perform a comprehensive analysis of uniform-velocity bilayer spacetime crystals,
combining concepts of conventional photonic crystals and special relativity. Given that a …

In this paper we study the electromagnetic scattering, absorption, and performance bounds
for short time modulated pulses that impinge on a time-varying lossy layer that is …