Terahertz relativistic spatial solitons in doped graphene metamaterials

  title={Terahertz relativistic spatial solitons in doped graphene metamaterials},
  author={Hui Dong and C Conti and Andrea Marini and Fabio Biancalana},
  journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
We propose an electrically tunable graphene-based metamaterial that shows a large nonlinear optical response at THz frequencies. The responsible nonlinearity comes from the intraband current, which we are able to calculate analytically. We demonstrate that the proposed metamaterial supports stable 2D spatial solitary waves. Our theoretical approach is not restricted to graphene, but can be applied to all materials exhibiting a conical dispersion supporting massless Dirac fermions. 

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