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Published on: June 7, 2019
Direct S-matrix calculation for diffractive structures and metasurfaces
Alexey A Shcherbakov1, Yury V Stebunov1,2, Denis F Baidin1
1Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Russia.
Abstract:
The paper presents a derivation of analytical components of S matrices for arbitrary planar diffractive structures and metasurfaces in the Fourier domain. The attained general formulas for S-matrix components can be applied within both formulations in the Cartesian and curvilinear metric. A numerical method based on these results can benefit from all previous improvements of the Fourier domain methods. In addition, we provide expressions for S-matrix calculation in the case of periodically corrugated layers of two-dimensional materials, which are valid for arbitrary corrugation depth-to-period ratios. As an example, the derived equations are used to simulate resonant grating excitation of graphene plasmons and the impact of a silica interlayer on corresponding reflection curves.
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