This Colloquium presents an overview of the research on nonlinear electromagnetic
metamaterials. The developed theoretical approaches and experimental designs are …

One-way propagation of light, analogous to the directional flow of electrons in the presence
of electric potential difference, has been an important goal in the wave–matter interaction …

We review the interaction of laser light with a single plasmonic nanostructure. Until recently,
the extremely weak optical response of a single nanostructure had only allowed …

A mechanism for asymmetric (nonreciprocal) wave transmission is presented. As a
reference system, we consider a layered nonlinear, nonmirror-symmetric model described …

We have proposed both symmetric and asymmetric configurations of 1D defective photonic
crystal structures, which are designed with an alternate arrangement of MgF 2 and PbS for …

Nonreciprocity and one-way propagation of optical signals are crucial for modern
nanophotonic technology, and typically achieved using magneto-optical effects requiring …

An electronic diode is a nonlinear semiconductor circuit component that allows conduction
of electrical current in one direction only. A component with similar functionality for …

Photonic crystals are well known for their celebrated photonic band-gaps—the forbidden
frequency ranges, for which the light waves cannot propagate through the structure. The …

A metamaterial (MM) differs from an ordinary optical material mainly in that it has a
dispersive magnetic permeability and offers greatly enhanced design freedom to alter the …

Reciprocity is fundamental to light transport and is a concept that holds also in rather
complex systems. Yet, reciprocity can be switched off even in linear, isotropic, and passive …