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 …

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 in anisotropic materials result in exotic optical features, which can provide
opportunities to control light at the nanoscale,,,,,,,,–. So far these polaritons have been …

In this brief review, we summarize and elaborate on some of the nomenclature of polaritonic
phenomena and systems as they appear in the literature on quantum materials and …

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 …

Control over charge carrier density provides an efficient way to trigger phase transitions and
modulate the optoelectronic properties of materials. This approach can also be used to …

The lattice symmetry of a crystal is one of the most important factors in determining its
physical properties. Particularly, low-symmetry crystals offer powerful opportunities to control …

Large optical anisotropy observed in a broad spectral range is of paramount importance for
efficient light manipulation in countless devices. Although a giant anisotropy has been …