During the last decade, possibilities to realize new phenomena and create new applications
by varying system properties in time have gained increasing attention in many research …

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 …

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 …

The interference method is used to achieve all-optical logic gate operations. This has been
realized with a single design of photonic crystal ring resonator at different wavelengths …

We provide a theoretical description of light scattering by a spherical particle the permittivity
of which is modulated in time at twice the frequency of the incident light. Such a particle acts …

In this opinion article, we briefly outline some historical highlights and the most recent
developments in the novel and exciting field of photonic time-crystals and present the …

Periodically driven systems are ubiquitously found in both classical and quantum regimes. In
the field of photonics, these Floquet systems have begun to provide insight into how time …

Recently, there has been increasing interest in the temporal degree of freedom in photonics
due to its analogy with spatial axes, causality and open-system characteristics. In particular …

Unraveling real eigenfrequencies in non-Hermitian PT-symmetric Hamiltonians has opened
avenues in quantum physics, photonics, and most recently, phononics. However, the …

We provide a theoretical framework to mold time-modulated mechanical metamaterials with
frequency conversion and wave-steering capabilities. To illustrate the concept, we initially …