Anisotropic planar polaritons-hybrid electromagnetic modes mediated by phonons,
plasmons, or excitons-in biaxial two-dimensional (2D) van der Waals crystals have attracted …

Moiré superlattices—twisted van der Waals (vdW) structures with small angles—are
attracting increasing attention in condensed matter physics, due to important phenomena …

In this paper, an actively tunable and switchable multi-functional terahertz metamaterial
device based on a hybrid vanadium dioxide (VO2)–graphene integrated configuration is …

Birefringence is at the heart of photonic applications. Layered van der Waals materials
inherently support considerable out-of-plane birefringence. However, funnelling light into …

Surface phonon polaritons (SPhPs) in polar dielectrics offer new opportunities for infrared
nanophotonics. However, bulk SPhPs inherently propagate isotropically with limited photon …

Polaritons in hyperbolic van der Waals materials—where principal axes have permittivities
of opposite signs—are light-matter modes with unique properties and promising …

Leveraging topological properties in the response of electromagnetic systems can greatly
enhance their potential. Although the investigation of singularity‐based electromagnetics …

Anisotropy has been a key property employed in the design of optical components for
hundreds of years. However, in recent years there has been growing interest in polaritons …

Natural hyperbolic materials (HMs) in two dimensions (2D) have an extraordinarily high
anisotropy and a hyperbolic dispersion relation. Some of them can even sustain hyperbolic …

Merging the properties of VO2 and van der Waals (vdW) materials has given rise to novel
tunable photonic devices. Despite recent studies on the effect of the phase change of VO2 …