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Published on: July 18, 2015
Exact solution for square-wave grating covered with graphene: surface plasmon-polaritons in the terahertz range
N M R Peres1, Yu V Bludov, Aires Ferreira
1Department of Physics and Center of Physics, University of Minho, Braga, Portugal. peres@fisica.uminho.pt
Abstract:
We provide an analytical solution to the problem of scattering of electromagnetic radiation by a square-wave grating with a flat graphene sheet on top. We show that for deep groves there is a strong plasmonic response, with light absorption in the graphene sheet reaching more than 45% due to the excitation of surface plasmon-polaritons. The case of a grating with a graphene sheet presenting an induced periodic modulation of the conductivity is also discussed.

