SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 16: Photonic Quantum Technologies (joint session Q/QI)
Q 16.3: Talk
Tuesday, March 7, 2023, 11:30–11:45, A320
Interfacing a quantum memory based on warm atomic vapour with single photons from a semiconductor quantum dot — •Benjamin Maaß1,2,3, Avijit Barua3, Norman Vincenz Ewald2, Leon Messner1,2,3, Jin-Dong Song4, Stephan Reitzenstein3, and Janik Wolters2,3 — 1Optische Systeme, Humboldt Universität zu Berlin, Germany — 2German Aerospace Center (DLR), Institute of Optical Sensor Systems, Berlin, Germany — 3Institut für Festkörperphysik, Technische Universität Berlin, Germany — 4Center for Opto-Electronic Materials and Devices, Korea Institute of Science and Technology, Korea
The complexity of modern quantum applications demands for heterogeneous technological solutions. In particular, the excellent controllability and robustness of atomic quantum memories and the effectiveness of single photon generation with solid state emitters can serve as a cornerstone for future applications in quantum optics, e.g. synchronization and buffering of optical networks.
We present prospects of using a warm caesium vapour as storage medium for single photons at the caesium D1 line (894nm). Our quantum memory is based on electromagnetically induced transparency (EIT) in a ladder-type configuration and allows for on-demand storage and retrieval of few-photon light pulses with 20 MHz repetition rate. We achieve 1/e storage times of 20 ns and an end-to-end efficiency of 1%. The high storage bandwidth of the memory and the low read-out noise promise compatibility with single photons from deterministically fabricated quantum light sources based on InGaAs quantum dots.