Jinghui Wu, Dongsheng Ding, Yang Liu, Zhiyuan Zhou, Baosen Shi, Xubo Zou, Guangcan Guo
We realized storage and retrieval of image of light in a two-dimensional magneto-optical trap of Rubidium 85 using a four-wave mixing system. When we imprint an image on a signal laser beam, the generated idler field also carries this image information. The retrieved signal and idler fields are observed this image information. That means the spatial patterns of the signal and idler are simultaneously mapped into the long-lived ground state coherence of the atoms. It is worth noticing that the retrieval efficiency is oscillating due to the time evolution of the ground state coherence in a uniform magnetic field. This image storage result holds promise for application in image processing, remote sensing and quantum communication.
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http://arxiv.org/abs/1204.0955
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