Effective surface conductivity of optical hyperbolic metasurfaces: from far-field characterization to surface wave analysis.

ABSTRACT: Metasurfaces offer great potential to control near- and far-fields through engineering optical properties of elementary cells or meta-atoms. Such perspective opens a route to efficient manipulation of the optical signals both at nanoscale and in photonics applications. In this paper we show that a local surface conductivity tensor well describes optical properties of a resonant plasmonic hyperbolic metasurface both in the far-field and in the near-field regimes, where spatial dispersion usually plays a crucial role. We retrieve the effective surface conductivity tensor from the comparative analysis of experimental and numerical reflectance spectra of a metasurface composed of elliptical gold nanoparticles. Afterwards, the restored conductivities are validated by semi-analytic parameters ob

SUBMITTER: Yermakov OY 

PROVIDER: S-EPMC6148295 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature