Double-electromagnetically induced transparency in a Y-type atomic system

Abstract

We study the absorption and dispersion properties of a weak tunable probe field in a four-level Y-type atomic system driven by two strong laser (coupling) fields within the framework of density matrix formalism. It is found that the probe absorption profile displays double-electromagnetically induced transparency (double-EIT) and it is shown how to control it by changing the Rabi frequencies as well as the atom field detuning of the coupling fields. © 2014 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.