Fig. 7
From: Subwavelength core/shell cylindrical nanostructures for novel plasmonic and metamaterial devices
(a is adapted from [38] and b–d are adapted from [39])
Excitation and guiding of graphene plasmons in various geometrical configurations. a Plasmonic modes in different graphene structures: infinite sheet, edge, ribbon and single-walled tube (left), and the corresponding graphene plasmon modes (right). b Schematic illustration of a graphene-coated NW. c Electric field (top) and intensity profiles (bottom) of various graphene plasmon modes with different angular mode numbers. d Dispersions of guided graphene plasmon modes with different angular mode numbers propagating along the graphene-coated NW with a radius of 100 nm. The permittivity of the background and the NW were set to one and three, respectively, and the chemical potential of graphene was set to 0.5 eV