Dielectric singularity in hyperbolic metamaterials: the inversion point of coexisting anisotropies.

ABSTRACT: Hyperbolic Metamaterials are artificially engineered materials whose optical properties can be specifically tailored to manifest an extremely high level of anisotropy. Due to this remarkable anisotropy they represent a unique opportunity to realize effective bulk meta-structure with extraordinary optical properties in the visible range. A simultaneous dielectric singularity in the in plane permittivity, with respect to the propagation direction, has to lead to a complete sign inversion of the same permittivity for that specific visible frequency. Such a drastic phase change has been theoretically highlighted in the past as the major challenge to be overcome in order to unlock many remarkable optical properties not present artificial optical systems. In this paper we experimentally demonstr

SUBMITTER: Caligiuri V 

PROVIDER: S-EPMC4735793 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature