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Thomas SE, Wagner L, Joos R, Sittig R, Nawrath C, Burdekin P, de Buy Wenniger IM, Rasiah MJ, Huber-Loyola T, Sagona-Stophel S, Höfling S, Jetter M, Michler P, Walmsley IA, Portalupi SL, Ledingham PM. Deterministic storage and retrieval of telecom light from a quantum dot single-photon source interfaced with an atomic quantum memory. SCIENCE ADVANCES 2024; 10:eadi7346. [PMID: 38608017 PMCID: PMC11014446 DOI: 10.1126/sciadv.adi7346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 03/12/2024] [Indexed: 04/14/2024]
Abstract
A hybrid interface of solid-state single-photon sources and atomic quantum memories is a long sought-after goal in photonic quantum technologies. Here, we demonstrate deterministic storage and retrieval of light from a semiconductor quantum dot in an atomic ensemble quantum memory at telecommunications wavelengths. We store single photons from an indium arsenide quantum dot in a high-bandwidth rubidium vapor-based quantum memory, with a total internal memory efficiency of (12.9 ± 0.4)%. The signal-to-noise ratio of the retrieved light field is 18.2 ± 0.6, limited only by detector dark counts.
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Affiliation(s)
- Sarah E. Thomas
- Department of Physics, Imperial College London, London SW7 2BW, UK
| | - Lukas Wagner
- Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQ) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Raphael Joos
- Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQ) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Robert Sittig
- Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQ) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Cornelius Nawrath
- Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQ) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Paul Burdekin
- Department of Physics, Imperial College London, London SW7 2BW, UK
| | | | | | - Tobias Huber-Loyola
- Julius-Maximilians-Universität Würzburg, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Lehrstuhl für Technische Physik, Am Hubland, 97074 Würzburg, Germany
| | | | - Sven Höfling
- Julius-Maximilians-Universität Würzburg, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Lehrstuhl für Technische Physik, Am Hubland, 97074 Würzburg, Germany
| | - Michael Jetter
- Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQ) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Peter Michler
- Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQ) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Ian A. Walmsley
- Department of Physics, Imperial College London, London SW7 2BW, UK
| | - Simone L. Portalupi
- Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQ) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
| | - Patrick M. Ledingham
- Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK
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Noh HR, Seb Moon H. Four-wave mixing in a ladder configuration of warm 87Rb atoms: a theoretical study. OPTICS EXPRESS 2021; 29:6495-6508. [PMID: 33726169 DOI: 10.1364/oe.416960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
We present a theoretical study of the four-wave mixing (FWM) spectra of 5S1/2 - 5P3/2 - 5D5/2 ladder-type transitions of 87Rb atoms. The density matrix equations are solved by considering all the magnetic sublevels to calculate the FWM signals in the atomic vapor cell. These results are subsequently compared with the experimental results. We observe that the FWM signal propagating exactly opposite to the driving field is measured experimentally. Additionally, we demonstrate the effects of optical depth, laser linewidths, and the coupling field power on the FWM spectra. Finally, the origin of the dispersive-like FWM signal is investigated by intentionally varying the intrinsic atomic properties.
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Kumar RR, Tsang HK. High-extinction CROW filters for scalable quantum photonics. OPTICS LETTERS 2021; 46:134-137. [PMID: 33362034 DOI: 10.1364/ol.409784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
We report an integrated tunable-bandwidth optical filter with a passband to stop-band ratio of over 96 dB using a single silicon chip with an ultra-compact footprint. The integrated filter is used in filtering out the pump photons in non-degenerate spontaneous four-wave mixing (SFWM), which is used for producing correlated photon pairs at different wavelengths. SFWM occurs in a long silicon waveguide, and two cascaded second-order coupled-resonator optical waveguide (CROW) filters were used to spectrally remove the pump photons. The tunable bandwidth of the filter is useful to adjust the coherence time of the quantum correlated photons and may find applications in large-scale integrated quantum photonic circuits.
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