Storage and Retrieval of an Image using Four-Wave Mixing in a Cold Atomic Ensemble

Details Storage and Retrieval of an Image using Four-Wave Mixing in a Cold Atomic Ensemble Storage and Retrieval of an Image using Four-Wave Mixing in a Cold Atomic Ensemble

2012-04-04

arxiv.org/abs/1204.0955v4

Physics

Atomic Physics

5 pages, 5 figures, 6 equations

Scientific paper

We experimentally realized storage and retrieval of an image of light in a cigar-shaped atomic cloud of Rubidium 85 using four-wave mixing (FWM) for the first time. The input signal and the generated idler beams in the FWM process, both carrying images, can be simultaneously mapped into and out of the long-lived ground state coherence of the cold atomic ensemble. We also observed the oscillations of the retrieval efficiencies of signal and idler due to the Larmor precession of the ground state coherence in a uniform magnetic field, which is an exhibition of the storage of the phase between signal and idler. This image storage technique holds promise for application in image processing, remote sensing and quantum communication.

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