Soliton modes, stability, and drift in optical lattices with spatially modulated nonlinearity

TL;DR

This paper explores how spatial modulation of both linear and nonlinear refractive indices in optical lattices affects soliton properties, revealing new stability, mobility, and shape control mechanisms.

Contribution

It introduces novel soliton behaviors arising from the interplay of linear and nonlinear index modulations, expanding understanding of soliton dynamics in complex optical media.

Findings

Modulation affects soliton stability and mobility.

Out-of-phase index modulations lead to shape transformations.

Light intensity can control soliton properties.

Abstract

We put forward new properties of lattice solitons in materials and geometries where both, the linear refractive index and the nonlinearity are spatially modulated. We show that the interplay between linear and out-of-phase nonlinear refractive index modulations results in new soliton properties, including modifications of the soliton stability and transverse mobility, as well as shape transformations that may be controlled, e.g., by varying the light intensity.