Graphene supports the propagation of subwavelength optical solitons
  We study theoretically nonlinear propagation of light in a graphene monolayer. We show that the large intrinsic nonlinearity of graphene at optical frequencies enables the formation of quasi one-dimensional self-guided beams (spatial solitons) featuring subwavelength widths at moderate electric-field peak intensities. We also demonstrate a novel class of nonlinear self-confined modes resulting from the hybridization of surface plasmon polaritons with graphene optical solitons. 
M. L. Nesterov, J. Bravo-Abad, A. Yu. Nikitin, F. J. Garcia-Vidal, and   L. Martin-Moreno
physics.optics