Spatial gap-soliton in periodic nonlinear structures

Abstract

Waveguiding properties of nonlinear periodic dielectric structures have recently been a subject of intensive exploration [1-3]. Active structures typical for arrays of antiguided semiconductor lasers have some interesting nonlinear properties [5]; for instance, waves propagating in such structures may undergo either self-focusing or self-defocusing depending on the parameters of structure. This paper is devoted to the investigation of the static properties of periodic nonlinear dielectric structures. The results can be explained in terms of spatial gap solitons analogous to temporal gap solitons [6].