Martin Mücke, Joerg Bochmann, Carolin Hahn, Andreas Neuzner, Christian Nölleke, Andreas Reiserer, Gerhard Rempe, Stephan Ritter
A single Rubidium atom trapped within a high-finesse optical cavity is an efficient source of single photons. We theoretically and experimentally study single-photon generation using a vacuum stimulated Raman adiabatic passage (vSTIRAP). We experimentally achieve photon generation efficiencies of up to 34% and 58% on the D1 and D2 line, respectively. Output coupling with 89% results in record-high efficiencies for single photons in one spatio-temporally well-defined propagating mode. We demonstrate that the observed generation efficiencies are constant in a wide range of applied pump laser powers and virtual level detunings. This allows for independent control over the frequency and wave packet envelope of the photons without loss in efficiency. In combination with long trapping time of the atom in the cavity our system constitutes a significant advancement towards an on-demand, highly efficient single-photon source for quantum information processing tasks.
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http://arxiv.org/abs/1302.2897
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