Atomic vapor quantum memory for on-demand semiconductor single photon sources

Esteban Gómez-López; Anja Jovicevic; Karol Winkler; Jonathan Jurkat; Moritz Meinecke; Janik Wolters; Tobias Huber-Loyola; Sven Höfling; Oliver Benson

doi:10.1117/12.3016381

7 June 2024 Atomic vapor quantum memory for on-demand semiconductor single photon sources

Esteban Gómez-López, Anja Jovicevic, Karol Winkler, Jonathan Jurkat, Moritz Meinecke, Janik Wolters, Tobias Huber-Loyola, Sven Höfling, Oliver Benson

Author Affiliations +

Proceedings Volume 13025, Advanced Photon Counting Techniques XVIII; 130250A (2024) https://doi.org/10.1117/12.3016381
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States

Abstract

Quantum memories play a pivotal role in establishing long-distance communication by entanglement swapping operations within quantum repeater nodes. Constructing such a quantum memory involves Electromagnetically Induced Transparency (EIT) within atomic vapors at room temperatures to store highly attenuated coherent light pulses down to the level of single photons. The photons may be generated from quantum nodes containing stationary quantum systems, such as atoms or semiconductor quantum dots (QDs). QDs serve as a potent source of quantum light, furnishing bright, precisely timed single photons of exceptional purity. While previous endeavors have demonstrated the integration of QDs with atomic vapors through techniques like “slow light,” the development of a dedicated quantum memory for QDs remains unmatched. In our study, we introduce an EIT quantum memory hosted within warm cesium vapor. Our approach exhibits a good efficiency in storing faint coherent light pulses at the single photon level. Moreover, the measured bandwidth of around 200 MHz approaches the Fourier-limited emission characteristics of QDs. We present initial efforts to match the emission from QDs with our quantum memory and discuss application scenarios of room temperature EIT quantum memories.

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Esteban Gómez-López, Anja Jovicevic, Karol Winkler, Jonathan Jurkat, Moritz Meinecke, Janik Wolters, Tobias Huber-Loyola, Sven Höfling, and Oliver Benson "Atomic vapor quantum memory for on-demand semiconductor single photon sources", Proc. SPIE 13025, Advanced Photon Counting Techniques XVIII, 130250A (7 June 2024); https://doi.org/10.1117/12.3016381

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