Eur. Phys. J. D (2014) 68: 290
https://doi.org/10.1140/epjd/e2014-50070-2

Regular Article

Photon emission control in V-type three-level systems via a radio frequency field

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

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

Received: 23 January 2014
Received in final form: 11 April 2014
Published online: 7 October 2014

Abstract

We study the controlled photon emission of generic V-type three-level molecules (e.g. BaF) via a radio frequency field. The density matrix approach was employed to calculate the probabilities of emission of one or two X-polarised photons. The influence of the relative delay phase between the sequential pulse on the emission photon probabilities can be enhanced or eliminated by the polarisation of the radio frequency field. For θ ∈ [ 0.35π,0.75π ] + nπ, the influence of the relative delay phase is enhanced, whereas for θ ∉ [ 0.35π,0.75π ] + nπ the influence is suppressed. The probabilities of emitting one or two X-polarised photons oscillate with the modulation index ζ, and several zero points exist, which could be used as a trigger for photon emissions. The results also demonstrated the phenomenon of radio frequency field-assisted photon absorption.