Frequency tuning of single photons from a whispering-gallery mode resonator to MHz-wide transitions

Research output: Contribution to journalJournal article – Annual report year: 2016Researchpeer-review

  • Author: Schunk, Gerhard

    Friedrich-Alexander University Erlangen-Nürnberg, Germany

  • Author: Vogl, Ulrich

    Friedrich-Alexander University Erlangen-Nürnberg, Germany

  • Author: Sedlmeir, Florian

    Friedrich-Alexander University Erlangen-Nürnberg, Germany

  • Author: Strekalov, D. V.

    Friedrich-Alexander University Erlangen-Nürnberg, Germany

  • Author: Otterpohl, A.

    Friedrich-Alexander University Erlangen-Nürnberg, Germany

  • Author: Averchenko, V.

    Friedrich-Alexander University Erlangen-Nürnberg, Germany

  • Author: Schwefel, Harald G. L.

    University of Otago, New Zealand

  • Author: Leuchs, G.

    Friedrich-Alexander University Erlangen-Nürnberg, Germany

  • Author: Marquardt, Christoph

    Quantum Physics and Information Techology, Department of Physics, Technical University of Denmark

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Quantum repeaters rely on interfacing flying qubits with quantum memories. The most common implementations include a narrowband single photon matched in bandwidth and central frequency to an atomic system. Previously, we demonstrated the compatibility of our versatile source of heralded single photons, which is based on parametric down-conversion in a triply resonant whispering-gallery mode resonator, with alkaline transitions [Schunk et al., Optica 2015, 2, 773]. In this paper, we analyse our source in terms of phase matching, available wavelength-tuning mechanisms and applications to narrowband atomic systems. We resonantly address the D1 transitions of caesium and rubidium with this optical parametric oscillator pumped above its oscillation threshold. Below threshold, the efficient coupling of single photons to atomic transitions heralded by single telecom-band photons is demonstrated. Finally, we present an accurate analytical description of our observations. Providing the demonstrated flexibility in connecting various atomic transitions with telecom wavelengths, we show a promising approach to realize an essential building block for quantum repeaters.
Original languageEnglish
JournalJournal of Modern Optics
Volume63
Issue number20
Pages (from-to)2058-2073
ISSN0950-0340
DOIs
Publication statusPublished - 2016
CitationsWeb of Science® Times Cited: No match on DOI

ID: 123511149