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Backaction in metasurface etalons | | Andrej Kwadrin
; Clara I. Osorio
; A. Femius Koenderink
; | | Date: |
11 May 2015 | | 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-P’erot 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-P’erot 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-P’erot 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. | | Source: | arXiv, 1505.2727 | | Services: | Forum | Review | PDF | Favorites | |
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