Analyzing the polarization response of a chiral metasurface stack by semi-analytic modeling

We investigate a class of stacked metasurfaces where the interaction between layers is dominated by their respective far-field response. Using a semi-analytic scattering matrix approach, we exploit the Fabry-Perot-type response for different layer distances to show the spectral tunability of the res...

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Bibliographic Details
Published in:Optics express 2019-01, Vol.27 (2), p.1236-1248
Main Authors: Sperrhake, Jan, Decker, Manuel, Falkner, Matthias, Fasold, Stefan, Kaiser, Thomas, Staude, Isabelle, Pertsch, Thomas
Format: Article
Language:English
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Summary:We investigate a class of stacked metasurfaces where the interaction between layers is dominated by their respective far-field response. Using a semi-analytic scattering matrix approach, we exploit the Fabry-Perot-type response for different layer distances to show the spectral tunability of the resonant effect. This method presents a faster and more intuitive route to modeling Fabry-Perot-type effects than rigorous numerical simulations. The results are illustrated for a chiral metasurface stack that exhibits asymmetric transmission. Here, the effect of asymmetric transmission is highly sensitive to the layer distance, which is used as a free parameter in our model. To prove our theoretical findings we fabricate two variants of the stack with different layer distances and show that far-field interaction between layers is sufficient to generate the effect while being accessible by semi-analytic modeling. The analyticity of the approach is promising for designing sophisticated layered media containing stacks of arbitrary metasurfaces.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.27.001236