Bremer, L. Fischbach, S. Park, S.-I. Rodt, S. Song, J.-D. Heindel, T. Reitzenstein, S. 2024-01-19T18:04:57Z 2024-01-19T18:04:57Z 2021-09-02 2020-02 2511-9044 https://pubs.kist.re.kr/handle/201004/119041 Quantum light sources are key building blocks of photonic quantum technologies. For many applications, it is of interest to control the arrival time of single photons emitted by such quantum devices, or even to store single photons in quantum memories. In situ electron beam lithography is applied to realize InGaAs quantum dot (QD)-based single-photon sources, which are interfaced with cesium (Cs) vapor to control the time delay of emitted photons. Via numerical simulations of the light？matter interaction in realistic QD-Cs-vapor configurations, the influence of the vapor temperature and spectral QD-atom detuning is explored to maximize the achievable delay in experimental studies. As a result, this hybrid quantum system allows to trigger the emission of single photons with a linewidth as low as 1.54？GHz even under non-resonant optical excitation and to delay the emission pulses by up to (15.71？±？0.01) ns for an effective cell length of 150？mm. This work can pave the way for scalable quantum systems relying on a well-controlled delay of single photons on a time scale of up to a few tens of nanoseconds. ？ 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim English Wiley-VCH Verlag Cesium-Vapor-Based Delay of Single Photons Emitted by Deterministically Fabricated Quantum Dot Microlenses Article 10.1002/qute.201900071 1 Advanced Quantum Technologies, v.3, no.2 Advanced Quantum Technologies 3 2 N scopus 000548091400009 2-s2.0-85106548366 Quantum Science & Technology Optics Physics Optics Article Cesium Delay control systems Electron beam lithography Elementary particle sources Gallium alloys Gallium compounds Graphene quantum dots Light Light sources Nanocrystals Particle beams Quantum optics Semiconducting indium gallium arsenide Semiconductor alloys Semiconductor quantum dots Atomic vapor Building blockes delays Emitted photons Quantum memory Quantum technologies Single-photon source Vapor temperature Photons atomic vapors delays deterministic fabrication quantum dots single-photon sources