Light storage in an optically thick atomic ensemble under conditions of electromagnetically induced transparency and four-wave mixing

Details Light storage in an optically thick atomic ensemble under conditions of electromagnetically induced transparency and four-wave mixing Light storage in an optically thick atomic ensemble under conditions of electromagnetically induced transparency and four-wave mixing

2011-03-10

arxiv.org/abs/1103.2131v1

Phys. Rev. A 83, 063823 (2011)

Physics

Quantum Physics

13 pages, 10 figures

Scientific paper

10.1103/PhysRevA.83.063823

We study the modification of a traditional electromagnetically induced transparency (EIT) stored light technique that includes both EIT and four-wave mixing (FWM) in an ensemble of hot Rb atoms. The standard treatment of light storage involves the coherent and reversible mapping of one photonic mode onto a collective spin coherence. It has been shown that unwanted, competing processes such as four-wave mixing are enhanced by EIT and can significantly modify the signal optical pulse propagation. We present theoretical and experimental evidence to indicate that while a Stokes field is indeed detected upon retrieval of the signal field, any information originally encoded in a seeded Stokes field is not independently preserved during the storage process. We present a simple model that describes the propagation dynamics of the fields and the impact of FWM on the spin wave.

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