Open AccessHyperbolic surface waves on anisotropic materials without hyperbolic dispersion
Author(s) -
Taavi Repän,
Osamu Takayama,
Andrei V. Lavrinenko
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.398808
Subject(s) - optics , materials science , surface wave , dispersion (optics) , permittivity , nanophotonics , anisotropy , isotropy , dielectric , electromagnetic radiation , surface plasmon , wave propagation , condensed matter physics , physics , optoelectronics , plasmon
We theoretically analyze directional surface electromagnetic waves supported at an interface between an isotropic medium and anisotropic metal with effective uniaxial negative permittivity. We identify two types of surface wave solutions, resulting in unique hyperbolic dispersion in the wavevector space. Such anisotropic metal can be realized by alternating dielectric and metallic layers with deep subwavelength thicknesses or metallic nanowires in dielectric host. Such systems serve as a platform for many applications in nanophotonics.