Eur. Phys. J. B (2015) 88: 23
https://doi.org/10.1140/epjb/e2014-50306-y

Regular Article

Optical Bloch equations in a bichromatic field; vibrational resonance

Indian Association for the Cultivation of Science, Jadavpur, 700032 Kolkata, India

^a e-mail: pcdsr@iacs.res.in

Received: 14 May 2014
Received in final form: 10 September 2014
Published online: 19 January 2015

Abstract

The effect of high frequency field on the optical response of a two-level system to a low frequency field is considered. We demonstrate that the response is maximum for an appropriate amplitude of the high frequency field. We derive an approximate analytic expression for the linear optical response function to corroborate the numerical observation of vibrational resonance.