Time-varying media have recently emerged as a new paradigm for wave manipulation, due
to the synergy between the discovery of highly nonlinear materials, such as epsilon-near …

This tutorial offers a comprehensive overview of photonic time crystals: artificial materials
whose electromagnetic properties are periodically modulated in time at scales comparable …

Temporal modulation recently draws great attentions in wave manipulations, with which one
can introduce the concept of temporal multilayer structure, a temporal counterpart of spatially …

Temporal interfaces introduced by abrupt switching of the constitutive parameters of
unbounded media enable unusual wave phenomena. So far, their explorations have been …

In this Letter, we present the first experimental demonstration of the temporal refraction of
acoustic waves in a phononic lattice. A step change in grounding stiffness results in a …

A metasurface (MTS)-based direction of arrival (DoA) estimation method is presented. The
method exploits the properties of space–time modulated reflective metasurfaces to estimate …

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 …

Nonreciprocity is critically important in modern wave technologies, yet its general principles
and practical implementations continue to raise intense research interest, in particular in the …

We study a class of temporal metamaterials characterized by time-varying dielectric
permittivity waveforms of duration much smaller than the characteristic wave-dynamical …

Multisection quarter-wave impedance transformers are widely applied in microwave
engineering and optics to attain impedance-matching networks and antireflection coatings …