Alexey Kalachev, Olga Kocharovskaya
A scheme for spatial multimode quantum memory is developed such that spatial-temporal structure of a weak signal pulse can be stored and recalled via cavity-assisted off-resonant Raman interaction with a strong angular-modulated control field in an extended $\Lambda$-type atomic ensemble. It is shown that effective multimode storage is possible when the Raman coherence spatial grating involves longitudinal wave vectors with respect to the paraxial signal field. The possibilities of implementing the scheme in the solid-state materials are discussed.
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http://arxiv.org/abs/1307.0148
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