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arXiv · 0706.1821

Holographic storage of multiple coherence gratings in a Bose-Einstein condensate

Yutaka Yoshikawa·Kazuyuki Nakayama·Yoshio Torii·Takahiro Kuga
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Abstract

We demonstrate superradiant conversion between a two-mode collective atomic state and a single-mode light field in an elongated cloud of Bose-condensed atoms. Two off-resonant write beams induce superradiant Raman scattering, producing two independent coherence gratings with a different wave vector in the cloud. By applying phase-matched read beams after a controllable delay, the gratings can be selectively converted into the light field also in a superradiant way. Due to the large cooperativity parameter and the small velocity width of the condensate, a high conversion efficiency of $> 70$ % and a long storage time of $> 120$ $μ$s were achieved.

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Yutaka Yoshikawa, Kazuyuki Nakayama, Yoshio Torii, Takahiro Kuga. 2007-12-01. Holographic storage of multiple coherence gratings in a Bose-Einstein condensate. https://doi.org/10.1103/physrevlett.99.220407

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