For more than seven decades, hexagonal boron nitride (hBN) has been employed as an
inert, thermally stable engineering ceramic; since 2010, it has also been used as the optimal …

Phonon polaritons provide useful opportunities, complementary to those provided by
plasmon polaritons, in the study of the interaction of light with matter at small scales. The …

The biaxial van der Waals semiconductor α‐phase molybdenum trioxide (α‐MoO3) has
recently received significant attention due to its ability to support highly anisotropic phonon …

Polaritons–coupled excitations of photons and dipolar matter excitations–can propagate
along anisotropic metasurfaces with either hyperbolic or elliptical dispersion. At the …

Hyperbolic phonon polaritons (HPhPs) are generated when infrared photons couple to polar
optic phonons in anisotropic media, confining long-wavelength light to nanoscale volumes …

Exploiting polaritons in natural vdW materials has been successful in achieving extreme
light confinement and low-loss optical devices and enabling simplified device integration …

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 …

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

One of the main bottlenecks in the development of terahertz (THz) and long-wave infrared
(LWIR) technologies is the limited intrinsic response of traditional materials. 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 …