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

 
: Sperrhake, J.; Decker, M.; Falkner, M.; Fasold, S.; Kaiser, T.; Staude, I.; Pertsch, T.

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Fulltext ()

Optics Express 27 (2019), No.2, pp.1236-1248
ISSN: 1094-4087
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
03ZZ0466
Deutsche Forschungsgemeinschaft DFG
STA 1426/1-1
Deutsche Forschungsgemeinschaft DFG
PE 1524/10-1
English
Journal Article, Electronic Publication
Fraunhofer IOF ()

Abstract
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.

: http://publica.fraunhofer.de/documents/N-549471.html