Hyperbolic shear polaritons in low-symmetry crystals.

ABSTRACT: The lattice symmetry of a crystal is one of the most important factors in determining its physical properties. Particularly, low-symmetry crystals offer powerful opportunities to control light propagation, polarization and phase^1-4. Materials featuring extreme optical anisotropy can support a hyperbolic response, enabling coupled light-matter interactions, also known as polaritons, with highly directional propagation and compression of light to deeply sub-wavelength scales⁵. Here we show that monoclinic crystals can support hyperbolic shear polaritons, a new polariton class arising in the mid-infrared to far-infrared due to shear phenomena in the dielectric response. This feature emerges in materials in which the dielectric tensor cannot be diagonalized, that is, in l

SUBMITTER: Passler NC 

PROVIDER: S-EPMC8866127 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature