Surface waves in uniaxially anisotropic left-handed materials
  The linear and nonlinear surface waves propagating along the interface separating isotropic conventional and uniaxially anisotropic left-handed materials is investigated. The conditions of the existence of surface TM-modes is determined. It is shown that surface waves can be formed when the components of the permittivity and permeability tensors of the uniaxially anisotropic left-handed materials are simultaneously negative. A transition layer sandwiched between connected media is described using a model of a two-dimensional gas of quantum dots. Explicit analytical expressions for a surface optical soliton of self-induced transparency in the presence of single and biexciton transitions depends on the magnetic permeability of the left-handed medium, are given with realistic parameters which can be reached in current experiments. It is shown that the sign of the total energy flow of the surface soliton depends on the parameters of the quantum dots and connected media. 
G. T. Adamashvili and A. Knorr