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On-demand superradiant conversion of atomic spin gratings into single photons with high efficiency.

Authors
Type
Published Article
Journal
Physical review letters
Publication Date
Volume
95
Issue
13
Pages
133601–133601
Identifiers
PMID: 16197139
Source
Medline
License
Unknown

Abstract

We create quantized spin gratings by single-photon detection and convert them on demand into photons with retrieval efficiencies exceeding 40% (80%) for single (a few) quanta. We show that the collective conversion process, proceeding via superradiant emission into a moderate-finesse optical resonator, requires phase matching. The storage time of 3 micros in the cold-atom sample, as well as the peak retrieval efficiency, are likely limited by Doppler decoherence of the entangled state.

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