Surface plasmons are coherent and collective electron oscillations confined at the dielectric–
metal interface. Benefitting from the inherent subwavelength nature of spatial profile, surface …

Recent progress on nonlinear properties of parity-time (PT)-symmetric systems is
comprehensively reviewed in this article. PT symmetry started out in non-Hermitian quantum …

Optical tweezers employing forces produced by light underpin important manipulation tools
employed in numerous areas of applied and biological physics. Conventional optical …

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

Recent progress in understanding the topological properties of condensed matter has led to
the discovery of time-reversal-invariant topological insulators. A remarkable and useful …

Linear acoustic metamaterials (LAMs) are widely used to manipulate sound; however, it is
challenging to obtain bandgaps with a generalized width (ratio of the bandgap width to its …

Metamaterials, artificial composite structures with exotic material properties, have emerged
as a new frontier of science involving physics, material science, engineering and chemistry …

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

Underpinned by the advent of metamaterials, transformation optics offers great versatility for
controlling electromagnetic waves to create materials with specially designed properties …

Optical metamaterials and nanoplasmonics bridge the gap between conventional optics and
the nanoworld. Exciting and technologically important capabilities range from …