Maass, Benjamin Barua, Avijit Ewald, Norman Vincenz Robertson, Elizabeth Gaur, Kartik Park, Suk In Rodt, Sven Song, Jin-Dong Reitzenstein, Stephan Wolters, Janik 2025-07-30T05:30:13Z 2025-07-30T05:30:13Z 2025-07-28 2025-10 2058-9565 https://pubs.kist.re.kr/handle/201004/152885 Interfacing light from solid-state single-photon sources with scalable and robust room-temperature quantum memories has been a long-standing challenge in photonic quantum information technologies due to inherent noise processes and time-scale mismatches between the operating conditions of solid-state and atomic systems. Here, we demonstrate storage of single photons from a semiconductor quantum dot (QD) device in a room-temperature atomic vapor memory and their on-demand retrieval. A deterministically fabricated InGaAs QD light source emits single photons at the wavelength of the cesium D1 line at 895 nm which exhibit an inhomogeneously broadened linewidth of 5.1(7) GHz and are subsequently stored in a low-noise ladder-type cesium vapor memory. We show control over the interaction between the single photons and the atomic vapor, allowing for variable retrieval times of up to 19.8(3) ns. A maximum internal efficiency of eta int=0.6(1)% is achieved. Our results expand the application space of both room-temperature vapor memories and semiconductor QDs in future quantum network architectures. English IOP PUBLISHING LTD Storage of single photons from a semiconductor quantum dot in a room-temperature atomic vapor memory with on-demand retrieval Article 10.1088/2058-9565/ade910 1 Quantum Science and Technology, v.10, no.3 Quantum Science and Technology 10 3 Y scie scopus 001528735800001 2-s2.0-105010760531 Quantum Science & Technology Physics, Multidisciplinary Physics Article DESIGN GAAS quantum dots single-photon sources quantum networks quantum memories