Eur. Phys. J. D 58, 339-348 (2010)
https://doi.org/10.1140/epjd/e2010-00129-1

Slow-light solitons in three-level atomic systems modified by a microwave field

¹ Department of Physics, East China Normal University, 200062, Shanghai, P.R. China
² State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, 200062, Shanghai, P.R. China
³ Institute of Nonlinear Physics, and Department of Physics, Zhejiang Normal University, 321004, Zhejiang, P.R. China

Corresponding author: ^a gxhuang@phy.ecnu.edu.cn

Received: 29 November 2009
Revised: 20 March 2010
Published online: 12 May 2010

Abstract

We study the modified effect of slow-light soliton in a resonant three-level atomic system via electromagnetically induced transparency (EIT) by utilizing a microwave field. We derive a high-order nonlinear Schrödinger equation by using a perturbation method of multiple-scales, and calculate the modification of soliton velocity and frequency shift. We find that in the presence of the microwave field an obvious decrease of propagating velocity of soliton can be realized, which provides an effective method to slow down optical solitons in EIT systems. We also find that the down shift of oscillating frequency of soliton in such system can be largely suppressed by the microwave field.