Plasmon resonances in two-layered circular graphene shells

We address surface and volume resonance in two concentric cylindrical graphene shells driven by the H-polarized plane wave of the THz range. Modeling implies analytical solution of the wave scattering in presence of impedance boundary conditions at thin graphene shells. Cases are considered of graphene positioned in the free space and at the inner and outer sides of a dielectric tube. Spectra of normalized scatter and absorption cross-sections are presented together with the spatial distributions of the field in the vicinity of object. These reveal hybrid resonance of surface plasmons and the eigen-waves in separating dielectric tube.