Indistinguishable tunable single photons emitted by spin-flip Raman transitions in InGaAs quantum dots

Yu He, Yu Ming He, Y. J. Wei, X. Jiang, M. C. Chen, F. L. Xiong, Y. Zhao, Christian Schneider, Martin Kamp, Sven Höfling, Chao Yang Lu, Jian Wei Pan

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Abstract

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).

Original languageEnglish
Article number237403
JournalPhysical review letters
Volume111
Issue number23
DOIs
Publication statusPublished - 2013 Dec 4

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    He, Y., He, Y. M., Wei, Y. J., Jiang, X., Chen, M. C., Xiong, F. L., Zhao, Y., Schneider, C., Kamp, M., Höfling, S., Lu, C. Y., & Pan, J. W. (2013). Indistinguishable tunable single photons emitted by spin-flip Raman transitions in InGaAs quantum dots. Physical review letters, 111(23), [237403]. https://doi.org/10.1103/PhysRevLett.111.237403