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Sci Rep. 2015 Dec 10;5:18179. doi: 10.1038/srep18179.

Image routing via atomic spin coherence.

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Key Laboratory of Coherence Light, Atomic and Molecular Spectroscopy, College of Physics, Jilin University, Changchun, 130012, P. R. China.
Institute of atomic and Molecular Physics, Jilin University, Changchun, 130012, P. R. China.


Coherent storage of optical image in a coherently-driven medium is a promising method with possible applications in many fields. In this work, we experimentally report a controllable spatial-frequency routing of image via atomic spin coherence in a solid-state medium driven by electromagnetically induced transparency (EIT). Under the EIT-based light-storage regime, a transverse spatial image carried by the probe field is stored into atomic spin coherence. By manipulating the frequency and spatial propagation direction of the read control field, the stored image is transferred into a new spatial-frequency channel. When two read control fields are used to retrieve the stored information, the image information is converted into a superposition of two spatial-frequency modes. Through this technique, the image is manipulated coherently and all-optically in a controlled fashion.

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