Nonlinear surface plasmons guided by thin metal films.
We have derived and solved numerically the dispersion relations for waves guided by a thin metal film bounded on one or both sides by media with intensity-dependent refractive indices. Depending on the conditions, the usual two modes can be cut off and can undergo radical changes in their field distributions, and new modes can exist above certain power threshholds.
Stegeman
G I
GI
Seaton
C T
CT