Backaction in metasurface etalons

Abstract

We consider the response of etalons created by a combination of a conventional mirror and a metasurface, composed of a periodic lattice of metal scatterers with a resonant response. This geometry has been used previously for perfect absorption, in so-called Salisbury screens, and for hybridization of localized plasmons with Fabry-Perot resonances. The particular aspect we address is if one can assume an environment-independent reflectivity for the metasurface when calculating the reflectivity of the composite system, as in a standard Fabry-Perot analysis, or whether the fact that the metasurface interacts with its own mirror image renormalizes its response. Using lattice sum theory, we take into account all possible retarded dipole-dipole interactions of scatterers in the metasurface amongst each other, and through the mirror. We show that while a layer-by-layer Fabry-Perot formalism captures the main qualitative features of metasurface etalons, in fact the mirror modifies both the polarizability and reflectivity of the metasurface in a fashion that is akin to Drexhage's modification of the radiative properties of a single dipole.

10 pages, 5 figures

References in corpus (6)

• A Perfect Metamaterial Absorber
• A metamaterial absorber for the terahertz regime: Design, fabrication and characterization
• Design, theory, and measurement of a polarization insensitive absorber for terahertz imaging
• Full transmission through perfect-conductor subwavelength hole arrays
• Gray-Tone Lithography Implementation of Drexhage's Method for Calibrating Radiative and Nonradiative Decay Constants of Fluorophores
• Probing the electrodynamic local density of states with magnetoelectric point scatterers

Cited by in corpus (2)

• General point dipole theory for periodic metasurfaces: magnetoelectric scattering lattices coupled to planar photonic structures
• Controlling nanoantenna polarizability through backaction via a single cavity mode