  The paper considers the dynamics of nonlinear surface plasmon polariton waves
in a planar plasmon waveguide, which is a heterostructure of non-magnetic
metallic and dielectric layers. The obtained in the work nonlinear equations
and their analytical solutions describe the vector cnoidal and solitary plasmon
polariton waves excited by single electromagnetic pulse at the waveguide.
Nonlinear plasmon polariton waves arise under the influence of the Kerr
nonlinearity of metal and the saturation of nonlinearity at the
heterostructure. The period and profile of envelope of the excited nonlinear
surface plasmon polariton wave vary depending on the conditions of excitation
and the power of exciting electromagnetic pulse.
