Two-dimensional vector solitons in a cold atomic gas via electromagnetically induced transparency

Publication date: Available online 11 June 2019Source: Physics Letters AAuthor(s): Wen-Wu Deng, Shun-Fang Chen, Ya-Wei Guo, Hong Li, Si-Liu Xu, Qi Guo, Milivoj J. Belić, Yuan ZhaoAbstractWe investigate the formation and propagation of vector vortex solitons (VSs) and unipolar solitons (USs) in a cold coherent atomic gas with a Bessel lattice (BL). The system considered is a gas with a tripod level configuration. Owing to the big enhancement of Kerr nonlinearity contributed by the electromagnetically induced transparency (EIT), a weak vector vortex soliton can be effectively formed with ultraslow propagation velocity. We also demonstrate that the characteristics of two-dimensional VSs and USs can be controlled and manipulated by adjusting the parameters of BL. Results obtained may be useful for designing all-optical switches at low light levels.

Source: Physics Letters A - June 12, 2019 Category: Physics Source Type: research