Eur. Phys. J. D (2015) 69: 249
https://doi.org/10.1140/epjd/e2015-60407-x

Regular Article

Influences of Doppler effect on spontaneously generated coherence in a Rb atom

School of Physics, Shandong University, Jinan 250100, P.R. China

^a e-mail: yzheng@sdu.edu.cn

Received: 14 July 2015
Received in final form: 19 September 2015
Published online: 10 November 2015

Abstract

We study the influences of Doppler effect on spontaneously generated coherence in a Rb atom driven by a probe field and two control fields. We show that the propagating directions of the lasers and the wave-vector mismatch have influence on the absorption properties of the atom. By employing the Doppler effect and spontaneous generated coherence, the ultra-narrow lines in probe absorption profile near two-photon resonant position can be obtained.