Excitation of localized graphene plasmons by a metallic slit

Abstract

In this paper we show that graphene surface plasmons can be excited when an electromagnetic wave packet impinges on a single metal slit covered with graphene. The excitation of the plasmons localized over the slit is revealed by characteristic peaks in the absorption spectrum. It is shown that the position of the peaks can be tuned either by the graphene doping level or by the dielectric function of the material filling the slit. The whole system forms the basis for a plasmonic sensor when the slit is filled with an analyte.

Modeling of a Plasmonic Biosensor Based on a Graphene Nanoribbon Superlattice

“…[ 8 ] Later, the idea of using graphene for the electrical control of the SPPs induced metallic nanostructures has also been explored. [ 10,22–24 ]…”

“…[8] Later, the idea of using graphene for the electrical control of the SPPs induced metallic nanostructures has also been explored. [10,[22][23][24] Despite their high sensitivity, a shortcoming of conventional SPR-based sensors is the lack of selectivity. The sensing can be made species-selective if the resonance is pushed to longer wavelengths.…”