A Pure and Indistinguishable Single-Photon Source at Telecommunication Wavelength

Autor: Beatrice Da Lio, Carlos Faurby, Xiaoyan Zhou, Ming Lai Chan, Ravitej Uppu, Henri Thyrrestrup, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Peter Lodahl, Leonardo Midolo
Rok vydání: 2022
Předmět:
Zdroj: Advanced Quantum Technologies
da Lio, B, Faurby, C F D, zcf649, Z, Chan, M L, Uppu, R, Nielsen, H T, Scholz, S, Wieck, A D, Ludwig, A, Lodahl, P & Midolo, L 2022, ' A Pure and Indistinguishable Single-Photon Source at Telecommunication Wavelength ', Advanced Quantum Technologies, vol. 5, no. 5, 2200006 . https://doi.org/10.1002/qute.202200006
ISSN: 2511-9044
DOI: 10.1002/qute.202200006
Popis: On-demand single-photon sources emitting pure and indistinguishable photons at the telecommunication wavelength are a critical asset towards the deployment of fiber-based quantum networks. Indeed, single photons may serve as flying qubits, allowing communication of quantum information over long distances. Self-assembled InAs quantum dots embedded in GaAs constitute an excellent nearly deterministic source of high quality single photons, but the vast majority of sources operate in the 900-950 nm wavelength range, precluding their adoption in a quantum network. Here, we present a quantum frequency conversion scheme for converting single photons from quantum dots to the telecommunication C band, around 1550 nm, achieving 40.8% end-to-end efficiency, while maintaining both high purity and a high degree of indistinguishability during conversion with measured values of $g^{(2)}(0)=2.4\%$ and $V^{\text{corr}}=94.8\%$, respectively.
Comment: 7 pages, 4 figures
Databáze: OpenAIRE
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