Robust self-trapping of vortex beams in a saturable optical medium

Albert S. Reyna, Georges Boudebs, Boris A. Malomed, Cid B. De Araújo

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the observation of robust self-trapping of vortex beams propagating in a uniform condensed medium featuring local saturable self-focusing nonlinearity. Optical vortices with topological charge m=1, that remain self-trapped over approximately five Rayleigh lengths, are excited in carbon disulfide using a helical light beam at 532 nm and intensities from 8 to 10GW/cm2. At larger intensities, the vortex beams lose their stability, spontaneously breaking into two fragments. Numerical simulations based on the nonlinear Schrödinger equation, including the three-photon absorption and nonpolynomial saturation of the refractive nonlinearity, demonstrate close agreement with the experimental findings.

Original languageEnglish
Article number013840
JournalPhysical Review A
Volume93
Issue number1
DOIs
StatePublished - 21 Jan 2016
Externally publishedYes

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