Hexagonal boron nitride (h‐BN) is a layered inorganic synthetic crystal exhibiting high
temperature stability and high thermal conductivity. As a ceramic material it has been widely …

Polaritons are hybrid excitations of matter and photons. In recent years, polaritons in van der
Waals nanomaterials—known as van der Waals polaritons—have shown great promise to …

Photonic crystals (PhCs) are a kind of artificial structures that can mold the flow of light at
will. Polaritonic crystals (PoCs) made from polaritonic media offer a promising route to …

Nanostructured surfaces with designed optical functionalities, such as metasurfaces, allow
efficient harvesting of light at the nanoscale, enhancing light–matter interactions for a wide …

Optical metamaterials have presented an innovative method of manipulating light.
Hyperbolic metamaterials have an extremely high anisotropy with a hyperbolic dispersion …

The topological properties of an object, associated with an integer called the topological
invariant, are global features that cannot change continuously but only through abrupt …

Polaritons, originating from the interactions between photons and material excitations, have
attracted attention because of their strong field compression and deeply subdiffractional …

Various optical crystals possess permittivity components of opposite signs along different
principal directions in the mid-infrared regime, exhibiting exotic anisotropic phonon …

Polariton pulses—transient light-matter hybrid excitations—traveling through anisotropic
media can lead to unusual optical phenomena in space and time. However, studying these …

Abstract Epsilon‐near‐zero (ENZ) materials, exhibiting unique physical characteristics such
as near‐zero refraction, have aroused extensive interest and exhibit great potentials in novel …