Anomalous dispersion of transparent atomic two- and three-level ensembles

Year: 2002

Authors: Rocco A., Wicht A., Rinkleff R.H., Danzmann K.

Autors Affiliation: Teilinst Hannover, Albert Einstein Inst, Max Planck Gravitat Phys, D-30167 Hannover, Germany; Leibniz Univ Hannover, Spekt Abt, Inst Atom & Mol Phys, D-30167 Hannover, Germany.

Abstract: The absorption and dispersion properties of a driven two-level atomic system probed by a weak field have been measured simultaneously with a phase modulated Mach-Zehnder interferometer. We find that the resonant absorption and the negative dispersion are reduced with respect to the nondriving case by a factor of 490 and 47, respectively, which is in good agreement with the theory. This means a similar to10-fold enhancement of the amount of dispersion provided per amount of residual absorption. The experimental values are compared to the requirements that have to be fulfilled for the realization of a broadband, high finesse optical cavity. Finally, we propose a specific degenerate three-level system that overcomes some of the shortcomings of the driven two-level atom.

Journal/Review: PHYSICAL REVIEW A

Volume: 66 (5)      Pages from: 53804-1  to: 53804-5

KeyWords: Group-velocity; Light; Absorption; Storage
DOI: 10.1103/PhysRevA.66.053804

Citations: 30
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