Resonance scattering of electromagnetic vortex bessel beams by an artificial gyrotropic cylinder

We study scattering of H- and E-polarized electromagnetic vortex Bessel beams in the infrared range by a gyrotropic cylinder constituted from graphene-sandwiched dielectric disks and located in free space in the case where the symmetry axes of the beam and the cylinder coincide. Significant enhancement of the beam scattering is found to occur if the topological charge and frequency of the vortex Bessel beam are equal to the azimuthal index and frequency of the cylinder multipole resonance, respectively.