Picosecond spatial soliton induced trapping of weak probe beam

Vaduganathan Ramesh Kumar, V. Rajadurai

Vaduganathan Ramesh Kumar, V Rajadurai

Tao Hong

We show that a weak probe light beam can form spatial solitons in an electromagnetically induced transparency (EIT) medium composed of four-level atoms and a coupling light field. We find that the coupling light beam can induce a highly controllable nonlinear waveguide and exert very strong effects on the dynamical behavior of the solitons. Hence, in the EIT medium, it is not only possible to produce spatial solitons at very low light intensities but also simultaneously control these solitons by using the coupling-light-induced nonlinear waveguide.

Farrès P. Mattar, David J. Kaup, George R. Harrison

Zhiwei Shi, Kody J. H. Law, P. G. Kevrekidis +1 more

She Yan-Chao, Denglong Wang, Ding Jian-Wen +1 more

By using multiple-scale method，we analytically study the nonlinear dynamical properties of an electromagnetically induced transparency medium with three-level atoms and a strong coupling light field. It is shown that a weak probe light beam can form spatial weak-light dark solitons. When it propagates along axial direction，the dark soliton will transforms into a steady spatial weak-light ring dark soliton，which results from the balance of the interplay between beam diffraction and refractive nonlinearity.