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 …

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

Phonon polaritons enable waveguiding and localization of infrared light with extreme
confinement and low losses. The spatial propagation and spectral resonances of such …

Polaritons in strongly anisotropic thin layers have recently captured considerable attention in
nanophotonics because of their directional propagation at the nanoscale, which offers …

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 …

Polar dielectrics with low crystal symmetry and sharp phonon resonances can support
hyperbolic shear polaritons, which are highly confined surface modes with frequency …

In conventional thin materials, the diffraction limit of light constrains the number of
waveguide modes that can exist at a given frequency. However, layered van der Waals …

In this work, we propose a multiband terahertz perfect absorber by combining a distributed
Bragg reflector (DBR) cavity with molybdenum disulfide (MoS 2) and graphene. The …

The power of optical spectroscopy and microscopy for minimally invasive characterization of
materials is well established across many disciplines. However, in general, its spatial …

Surface phonon polaritons (SPhPs) have become a key ingredient for infrared
nanophotonics owing to their long lifetimes and the large number of polar dielectric crystals …