Eur. Phys. J. D 65, 541-546 (2011)
https://doi.org/10.1140/epjd/e2011-20169-1

Regular Article

Modulation in the statistical properties of stochastic electromagnetic beams through an electromagnetic induced transparency atomic vapor

¹ Department of Physics and Institute of Condensed Matter Physics, Hangzhou Normal University, Hangzhou 310036, P.R. China
² Department of Physics, Zhejiang University, Hangzhou 310027, P.R. China

^a e-mail: zhaodaomu@yahoo.com

Received: 20 March 2011
Received in final form: 3 September 2011
Published online: 22 November 2011

Abstract

We report analytical expressions for the elements of the 2 × 2 cross-spectral density matrix of a stochastic electromagnetic beam passing through an electromagnetic induced transparency (EIT) atomic vapor. By use of the derived formulas the changes in the spectral density, the spectral degree of coherence, and the spectral degree of polarization of such a beam on propagation can be studied in detail. Numerical examples show that the statistical properties of the stochastic electromagnetic beam can be modulated by the Rabi frequency of the control light when the beam propagates through the EIT atomic vapor.