Polaritons are a hybrid class of quasiparticles originating from the strong and resonant
coupling between light and matter excitations. Recent years have witnessed a surge of …

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 …

Negative refraction provides a platform to manipulate mid-infrared and terahertz radiation for
molecular sensing and thermal emission applications. However, its implementation based …

We visualized negative refraction of phonon polaritons, which occurs at the interface
between two natural crystals. The polaritons—hybrids of infrared photons and lattice …

Polariton canalization is characterized by intrinsic collimation of energy flow along a single
crystalline axis. This optical phenomenon has been experimentally demonstrated at the …

Polaritons are well-established carriers of light, electrical signals, and even heat at the
nanoscale in the setting of on-chip devices. However, the goal of achieving practical …

Controlling light at subwavelength scales is crucial in nanophotonics. Hyperbolic polaritons,
supporting arbitrarily large wavevectors, enable extreme light confinement beyond the …

Polaritons, hybrid light and matter waves, offer a platform for subwavelength on-chip light
manipulation. Recent works on planar refraction and focusing of polaritons all rely on …

The vast repository of van der Waals (vdW) materials supporting polaritons offers numerous
possibilities to tailor electromagnetic waves at the nanoscale. The development of …

Low symmetry 2D materials with intrinsic in-plane anisotropic optical properties and high
tunability provide a promising platform to explore and manipulate light–matter interactions …