Abstract Space-time duality in paraxial optical wave propagation implies the existence of
intriguing effects when light interacts with a material exhibiting two refractive indexes …

Recently, strongly modulated photonic crystals, fabricated by the state-of-the-art
semiconductor nanofabrication process, have realized various novel optical properties. This …

A time-dependent change in the refractive index of a material leads to a change in the
frequency of an optical beam passing through that medium. Here, we experimentally …

The energy of an electromagnetic wave is converted as the wave passes through a temporal
boundary. Thus, effective temporal control of the medium is critical for frequency conversion …

The color of light is a fundamental property of electromagnetic radiation; as such, control of
the frequency is a cornerstone of modern optics. Nonlinear materials are typically used to …

We experimentally demonstrate excitability in a semiconductor two-dimensional photonic
crystal. Excitability is a nonlinear dynamical mechanism underlying pulselike responses to …

We demonstrate by experiment and theory that a light pulse propagating through a Si-based
photonic-crystal waveguide is adiabatically blueshifted when the refractive index of the Si is …

We demonstrate a new concept for reconfigurable nanophotonic devices exploiting ultrafast
nonlinear control of shaped wavefronts in a multimode nanomaterial consisting of …

We systematically studied the spectral and temporal characteristics of wavelength-sized
ultrahigh-Q photonic crystal nanocavities based on width-modulated line defects. By …

Time‐varying metamaterials offer new degrees of freedom for wave manipulation and
enable applications unattainable with conventional materials. In these metamaterials, the …