Stored light and EIT at high optical depths

Details Stored light and EIT at high optical depths Stored light and EIT at high optical depths

2008-12-29

arxiv.org/abs/0812.4939v1

Physics

Quantum Physics

8 pages, 5 figures, submitted to Proc. SPIE. Version here is slightly modified, including a different title and a redone Fig.

Scientific paper

We report a preliminary experimental study of EIT and stored light in the high optical depth regime. In particular, we characterize two ways to mitigate radiation trapping, a decoherence mechanism at high atomic density: nitrogen as buffer gas, and a long, narrow cell geometry. Initial results show the promise of both approaches in minimizing radiation trapping, but also reveal problems such as optical pumping into trapped end-states. We also observe distortion in EIT lineshapes at high optical depth, a result of interference from four-wave mixing. Experimental results are in good qualitative agreement with theoretical predictions.

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