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TitlePropagation of surface plasmons on plasmonic Bragg gratings
Author(s)Chaves, A. J.
Peres, N. M. R.
Issue date2019
PublisherAIP Publishing
JournalJournal of Applied Physics
CitationChaves, A. J., & Peres, N. M. R. (2019). Propagation of surface plasmons on plasmonic Bragg gratings. Journal of Applied Physics, 125(24), 243106.
Abstract(s)We use coupled-mode theory to describe the scattering of a surface-plasmon polariton (SPP) from a square wave grating (Bragg grating) of finite extension written on the surface of either a metal-dielectric interface or a dielectric-dielectric interface covered with a patterned graphene sheet. We find analytical solutions for the reflectance and transmittance of SPP's when only two modes (forward- and back-scattered) are considered. We show that in both cases the reflectance spectrum presents stop-bands where the SPP is completely back-scattered, if the grating is not too shallow. In addition, the reflectance coefficient shows Fabry-P\'erot oscillations when the frequency of the SPP is out of the stop-band region. For a single dielectric well, we show that there are frequencies of transmission equal to 1. We also provide simple analytical expression for the different quantities in the electrostatic limit.
Publisher version
AccessOpen access
Appears in Collections:CDF - CEP - Artigos/Papers (with refereeing)

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