Experimental investigation of optically controlled topological transition in bismuth-mica structure.

ABSTRACT: The hyperbolic materials are strongly anisotropic media with a permittivity/permeability tensor having diagonal components of different sign. They combine the properties of dielectric and metal-like media and are described with hyperbolic isofrequency surfaces in wave-vector space. Such media may support unusual effects like negative refraction, near-field radiation enhancement and nanoscale light confinement. They were demonstrated mainly for microwave and infrared frequency ranges on the basis of metamaterials and natural anisotropic materials correspondingly. For the terahertz region, the tunable hyperbolic media were demonstrated only theoretically. This paper is dedicated to the first experimental demonstration of an optically tunable terahertz hyperbolic medium in 0.2-1.0 THz frequen

SUBMITTER: Zaitsev A 

PROVIDER: S-EPMC8249560 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature