Stationary plasmon-soliton waves in metal-dielectric nonlinear planar structures: modeling and properties

摘要

We present three complementary methods to study stationary nonlinearsolutions in one-dimensional nonlinear metal-dielectric structures. Two of themuse an approximate treatment of the Kerr type nonlinear term taking intoaccount only the leading electric field component, while the third one allowsfor an exact treatment of the nonlinearity. A direct comparison of the resultsobtained with all three models is presented and the excellent agreement betweenthem justifies the assumptions that have been used to construct the models. Asystematic study of the configurations made of two, three, or four layers, thatcontain a semi-infinite Kerr type nonlinear dielectric, a metal film and lineardielectrics is presented. Detailed analysis of properties, type and number ofsolutions in these three types of structures is performed. The parameter rangeswhere plasmon-soliton waves exist are found. The structures with realisticopto-geometric parameters where plasmon-solitons exist at power levels alreadyused in spatial soliton studies are proposed and studied.