Indistinguishable Tunable Single Photons Emitted by Spin-Flip Raman Transitions in InGaAs Quantum Dots

Yu He (贺煜), Yu-Ming He (何玉明), Y.-J. Wei, X. Jiang, M.-C. Chen, F.-L. Xiong, Y. Zhao, Christian Schneider, Martin Kamp, Sven Höfling, Chao-Yang Lu, and Jian-Wei Pan
Phys. Rev. Lett. 111, 237403 – Published 4 December 2013
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This Letter reports all-optically tunable and highly indistinguishable single Raman photons from a driven single quantum dot spin. The frequency, linewidth, and lifetime of the Raman photons are tunable by varying the driving field power and detuning. Under continuous-wave excitation, subnatural linewidth single photons from off-resonant Raman scattering show an indistinguishability of 0.98(3). Under π pulse excitation, spin- and time-tagged Raman fluorescence photons show an almost vanishing multiphoton emission probability of 0.01(2) and a two-photon quantum interference visibility of 0.95(3). Lastly, Hong-Ou-Mandel interference is demonstrated between two single photons emitted from remote, independent quantum dots with an unprecedented visibility of 0.87(4).

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  • Received 3 July 2013


© 2013 American Physical Society

Authors & Affiliations

Yu He (贺煜)1, Yu-Ming He (何玉明)1, Y.-J. Wei1, X. Jiang1, M.-C. Chen1, F.-L. Xiong1, Y. Zhao1, Christian Schneider2, Martin Kamp2, Sven Höfling2,1,3, Chao-Yang Lu1, and Jian-Wei Pan1

  • 1Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 2Technische Physik, Physikalisches Institut and Wilhelm Conrad Röntgen-Center for Complex Material Systems, Universität Würzburg, Am Hubland, D-97074 Wüzburg, Germany
  • 3SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, United Kingdom

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Vol. 111, Iss. 23 — 6 December 2013

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