Efficient nonlinear optical interactions are essential for many applications in modern
photonics. However, they typically require intense laser sources and long interaction …

The discovery, design and development of materials are critically linked to advances in
many areas of research, and optics is no exception. Recently, the spectral region in which …

This article will review quantum particle creation in expanding universes. The emphasis will
be on the basic physical principles and on selected applications to cosmological models …

During the past few years, the optics and photonics communities have renewed their
attention toward transparent conducting oxides (TCOs), which for over two decades have …

The engineering of the spatial and temporal properties of both the electric permittivity and
the refractive index of materials is at the core of photonics. When vanishing to zero, those …

Materials with a spatially uniform but temporally varying optical response have applications
ranging from magnetic field-free optical isolators to fundamental studies of quantum field …

Optical materials with vanishing dielectric permittivity, known as epsilon-near-zero (ENZ)
materials, have been shown to possess enhanced nonlinear optical responses in their ENZ …

Since the beginning of metamaterial research, the electrodynamic properties of media with a
refractive index near zero have attracted the interest of the scientific community because of …

Epsilon-near-zero (ENZ) materials have shown significant potential for nonlinear optical
applications due to their extraordinary enhancement of optical nonlinearity. Our experiments …

Time-varying metasurfaces are emerging as a powerful instrument for the dynamical control
of the electromagnetic properties of a propagating wave. Here we demonstrate an efficient …