Electromagnetically induced transparency for Lambda - like systems with a structured continuum
arXiv:quant-ph/0506211 · doi:10.1016/j.optcom.2006.04.075
Abstract
Electric susceptibility of a laser-dressed atomic medium is calculated for a model Lambda - like system including two lower states and a continuum structured by a presence of an autoionizing state or a continuum with a laser-induced structure. Depending on the strength of a control field it is possible to obtain a significant reduction of the light velocity in a narrow frequency window in the conditions of a small absorption. A smooth transition is shown between the case of a flat continuum and that of a discrete state serving as the upper state of a Lambda system.
6 pages, 5 figures