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Proceedings Paper

Tunable lossless slow and fast light in a four-level N-system
Author(s): Irina Novikova; Eugeniy E. Mikhailov; Logan Stagg; Simon Rochester; Dmitry Budker
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Paper Abstract

We investigate the propagation of a weak probe laser field in a medium of warm Rb atoms, controlled with two strong resonant pump fields tuned to the D1 and D2 optical transitions to form an N-scheme arrangement. We have shown theoretically that four-wave mixing has a profound effect on the probe-field group velocity and absorption, allowing the probe-field propagation to be continuously tuned from superluminal to slow-light regimes with amplification. We have also identified the experimental conditions for observation of such tunable slow-to-fast light regime (continuously through the point of zero group index) with positive probe-field gain, and demonstrated that the spectral range corresponding to the zero group index can be tuned by controlling the power of one of the pump laser.

Paper Details

Date Published: 6 March 2013
PDF: 7 pages
Proc. SPIE 8636, Advances in Slow and Fast Light VI, 86360C (6 March 2013); doi: 10.1117/12.2010052
Show Author Affiliations
Irina Novikova, College of William and Mary (United States)
Eugeniy E. Mikhailov, College of William and Mary (United States)
Logan Stagg, The Univ. of North Carolina at Asheville (United States)
Simon Rochester, Rochester Scientific LLC (United States)
Dmitry Budker, Rochester Scientific LLC (United States)

Published in SPIE Proceedings Vol. 8636:
Advances in Slow and Fast Light VI
Selim M. Shahriar; Frank A. Narducci, Editor(s)

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