Low-dimensional, strongly anisotropic nanomaterials can support hyperbolic phonon
polaritons, which feature strong light–matter interactions that can enhance their capabilities …

Phonon polaritons in polar crystals have recently gained significant attention due to their
remarkable confinement and enhancement of electromagnetic fields, low group velocities …

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

Metaoptics formed by ultrathin and planar building blocks enable compact and efficient
optical devices that manipulate light at the nanoscale. The development of tunable …

Hyperbolic polaritons that originate from the extreme optical anisotropy in van der Waals
(vdW) crystals have gained much attention for their potential in controlling nanolight. For …

Scattering-type scanning near-field optical microscope (s-SNOM) has become an essential
tool to study polaritons—quasiparticles of light coupled to collective charge oscillations—via …

Photo-induced force microscopy (PiFM) represents a scanning probe technique renowned
for its ability to provide high-resolution spectroscopic imaging at the nanoscale. It capitalizes …

Negative refraction has a wide range of applications in diverse fields such as imaging,
sensing, and waveguides and typically entails the fabrication of intricate metamaterials …

The significance of antireflection has persisted over time due to its numerous optical
applications. To achieve broadband antireflection, multiple element-based designs using …

Topological insulators generally have dielectric bulk and conductive surface states.
Consequently, some of these materials are shown to support polaritonic modes at visible …