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2 February 2009 Slow light and EIT under realistic (imperfect) conditions
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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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Mason Klein, Yanhong Xiao, Michael Hohensee, David F. Phillips, and Ronald L. Walsworth "Slow light and EIT under realistic (imperfect) conditions", Proc. SPIE 7226, Advances in Slow and Fast Light II, 72260H (2 February 2009);

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