Non-Hermitian optics is a burgeoning field at the intersection of quantum physics,
electrodynamics, and nanophotonics. It provides a new perspective of the role of gain and …

The absorption of electromagnetic energy by a material is a phenomenon that underlies
many applications, including molecular sensing, photocurrent generation and …

Recently, exceptional points, a degeneracy of open wave systems, have been observed in
photonics, acoustics, and electronics. They have mainly been realized as a degeneracy of …

Dielectric metasurfaces have emerged as a powerful platform for novel optical biosensors.
Due to their low optical loss and strong light–matter interaction, they demonstrate several …

Optical metasurfaces are regular quasi-planar nanopatterns that can apply diverse spatial
and spectral transformations to light waves. However, metasurfaces are no longer …

Ultrafast all‐optical switching, possessing the unique function of light controlling light, is an
essential component of on‐chip ultrafast optical connection networks as well as integrated …

Metasurfaces, the 2D counterpart of artificial metamaterials, have attracted much attention
because of their exceptional ability to manipulate the electromagnetic wave such as …

The changing balance of forces at the nanoscale offers the opportunity to develop a new
generation of spatially reconfigurable nanomembrane metamaterials in which …

The toroidal dipole is a peculiar electromagnetic excitation that can not be presented in
terms of standard electric and magnetic multipoles. A static toroidal dipole has been shown …

Optical metasurfaces are nanoengineered architectures aiming at the functional control of
light propagation. In recent years, the performance of metasurfaces has been significantly …