Soliton emission in amplifying optical lattice surfaces

TL;DR

This paper investigates how surface-localized gain in saturable media enables controlled emission of solitons from optical lattice interfaces, with emission characteristics influenced by gain and lattice depth.

Contribution

It introduces a new mechanism for soliton emission at optical lattice surfaces using localized gain in saturable media, highlighting controllability via amplification and lattice parameters.

Findings

Surface solitons are supported by the interface with gain.

Saturation limits the maximum energy flow of solitons.

Thin amplifying layers enable controllable soliton emission.

Abstract

We address surface solitons supported by the interface of optical lattices imprinted in saturable media with surface-localized gain. The nonlinearity saturation puts restrictions on the maximal energy flow carried by surface solitons. As a consequence, the presence of thin amplifying layer near the surface results in the controllable emission of solitons towards the lattice at angles depending on the amplification rate and on lattice depth.