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We are studying plasmon-soliton coupling using directly Maxwell’s equations. We have developped two improved semi-analytical approach to tackle the 1D problem for nonlinear Kerr type dielectric/linear dielectric/metal structures embedded in an external medium. We have also developped a finite element method so as to be able to study more complex structures. These works are done to design a realisteic and feasible multilayer structures so as to observe for the first time the nonlinear surface waves that have been predicted since at least 1984 but not yet recorded.