Tunable lossless slow and fast light in a four-level N-system

Irina Novikova; Eugeniy E. Mikhailov; Logan Stagg; Simon Rochester; Dmitry Budker

doi:10.1117/12.2010052

6 March 2013 Tunable lossless slow and fast light in a four-level N-system

Irina Novikova, Eugeniy E. Mikhailov, Logan Stagg, Simon Rochester, Dmitry Budker

Author Affiliations +

Proceedings Volume 8636, Advances in Slow and Fast Light VI; 86360C (2013) https://doi.org/10.1117/12.2010052
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

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Irina Novikova, Eugeniy E. Mikhailov, Logan Stagg, Simon Rochester, and Dmitry Budker "Tunable lossless slow and fast light in a four-level N-system", Proc. SPIE 8636, Advances in Slow and Fast Light VI, 86360C (6 March 2013); https://doi.org/10.1117/12.2010052

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