Recent advances in ultrafast, large-modulation photonic materials have opened the door to
many new areas of research. One specific example is the exciting prospect of photonic time …

Photonic time-varying systems have attracted significant attention owing to their rich physics
and potential opportunities for new and enhanced functionalities. In this context, the duality …

Photonic time crystals (PTCs), materials with a dielectric permittivity that is modulated
periodically in time, offer new concepts in light manipulation. We study theoretically the …

Photonic time crystals are artificial materials whose electromagnetic properties are uniform
in space but periodically vary in time. The synthesis of these materials and experimental …

It is known that complete transmission of waves through the interface between two different
media can be achieved by proper impedance matching between them. One of the most …

We find topological band structures in photonic time crystals—materials in which the
refractive index varies periodically and abruptly in time. When the refractive index changes …

We study the propagation of electromagnetic waves in disordered photonic time crystals:
spatially homogenous media whose refractive index changes randomly in time. We find that …

When an electromagnetic (EM) wave propagates in a medium whose properties are varied
abruptly in time, the wave experiences refractions and reflections known as time-refractions …

Photonic time-crystals (PTCs) are spatially homogeneous media whose electromagnetic
susceptibility varies periodically in time, causing temporal reflections and refractions for any …

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 …