Metamaterials, artificial electromagnetic media that are structured on the subwavelength
scale, were initially suggested for the negative-index'superlens'. Later metamaterials …

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

Since the seminal paper by Bloembergen and colleagues on nonlinear optical interactions,
this field has supplied some of the most important contributions to optics-related science and …

Artificially engineered metamaterials are now demonstrating unprecedented
electromagnetic properties that cannot be obtained with naturally occurring materials. In …

Periodic nanostructures in photonics facilitate a far-reaching control of light propagation and
light–matter interaction. This article reviews the current status of this subject, including both …

We study experimentally the dynamic tunability and self-induced nonlinearity of split-ring
resonators incorporating variable capacitance diodes. We demonstrate that the …

In the past two decades, the research on acoustic metamaterials has flourished, which is
also benefited from the development of additive manufacturing technology. The exotic …

Negative refraction occurs at interfaces as a natural consequence of the negative group
velocity of waves in one of the interfacing media. The historical origin of this understanding …

We suggest and verify experimentally the concept of functional metamaterials whose
properties are remotely controlled by illuminating the metamaterial with a pattern of visible …

We study the properties of a tunable nonlinear metamaterial operating at microwave
frequencies. We fabricate the nonlinear metamaterial composed of double split-ring …