Vector solitons in nonlinear lattices

TL;DR

This paper investigates two-component vector solitons in nonlinear lattices with periodic modulation, revealing new stable multihump states and stabilization mechanisms for scalar solitons through vector coupling.

Contribution

It introduces the existence and stability analysis of complex multihump vector solitons in nonlinear lattices with periodic modulation.

Findings

Existence of dipole and fundamental vector solitons in nonlinear lattices.

Stable multihump vector solitons due to nonlinear modulation.

Scalar solitons can be stabilized via vector coupling.

Abstract

We consider two-component solitons in a medium with a periodic modulation of the nonlinear coefficient. The modulation enables the existence of complex multihump vector states. In particular, vector solitons composed of dipole and fundamental, or dipole and even double-hump components exist and may be stable. Families of unstable scalar solitons can be stabilized in the vectorial form, due to the coupling to a stable second component.