Group velocity study in hot87Rb vapour with buffer gas
- 1 October 2003
- journal article
- research article
- Published by Informa UK Limited in Journal of Modern Optics
- Vol. 50 (15-17), 2645-2654
- https://doi.org/10.1080/09500340308233590
Abstract
We study the behaviour of the group velocity of light under conditions of electromagnetically induced transparency (EIT) in a Doppler broadened medium. Specifically, we show how the group delay (or group velocity) of probe and generated Stokes fields depends on the one-photon detuning of drive and probe fields. We find that for atoms in a buffer gas the group velocity decreases with positive one-photon detuning of the drive fields, and increases when the fields are red detuned. This dependence is counterintuitive to what would be expected if the one-photon detuning resulted in an interaction of the light with the resonant velocity subgroup.Keywords
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