Vortex soliton in a cold atomic gas via electromagnetically induced transparency

TL;DR

This paper explores the formation and control of vortex and unipolar solitons in cold atomic gases with Bessel lattices, leveraging electromagnetically induced transparency to enable ultraslow, low-light-level all-optical switching.

Contribution

It demonstrates the formation and manipulation of vector vortex and unipolar solitons in cold atomic gases using EIT-enhanced Kerr nonlinearity and Bessel lattices, a novel approach for low-light-level optical switching.

Findings

Ultraslow propagation of vortex solitons achieved.

Control of soliton characteristics via Bessel lattices demonstrated.

Potential for low-light-level all-optical switching established.

Abstract

We investigate the formation and propagation of vector vortex solitons (VS) and unipolar soliton (US) in a cold atomic gas with Bessel lattices (BLs). The system we consider is a cold, coherent atomic gas with a tripod or multipod level configuration. Dueing to the giant enhancement of Kerr nonlinearity contributed by electromagnetically induced transparency (EIT), a vector weak vortex soliton can be effectively formed with ultraslow propagating velocity. Furthermore, we demonstrate that the characteristics of 2D VS and US can be controlled and manipulated via adjusting BLs. The results predicted here may be used to design all-optical switching at very low light level.