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Main Title: Slow and fast single photons from a quantum dot interacting with the excited state hyperfine structure of the Cesium D1-line
Author(s): Kroh, Tim
Wolters, Janik
Ahlrichs, Andreas
Schell, Andreas W.
Thoma, Alexander
Reitzenstein, Stephan
Wildmann, Johannes S.
Zallo, Eugenio
Trotta, Rinaldo
Rastelli, Armando
Schmidt, Oliver G.
Benson, Oliver
Type: Article
Language Code: en
Abstract: Hybrid interfaces between distinct quantum systems play a major role in the implementation of quantum networks. Quantum states have to be stored in memories to synchronize the photon arrival times for entanglement swapping by projective measurements in quantum repeaters or for entanglement purification. Here, we analyze the distortion of a single-photon wave packet propagating through a dispersive and absorptive medium with high spectral resolution. Single photons are generated from a single In(Ga)As quantum dot with its excitonic transition precisely set relative to the Cesium D1 transition. The delay of spectral components of the single-photon wave packet with almost Fourier-limited width is investigated in detail with a 200 MHz narrow-band monolithic Fabry-Pérot resonator. Reflecting the excited state hyperfine structure of Cesium, “slow light” and “fast light” behavior is observed. As a step towards room-temperature alkali vapor memories, quantum dot photons are delayed for 5 ns by strong dispersion between the two 1.17 GHz hyperfine-split excited state transitions. Based on optical pumping on the hyperfine-split ground states, we propose a simple, all-optically controllable delay for synchronization of heralded narrow-band photons in a quantum network.
Issue Date: 24-Sep-2019
Date Available: 11-May-2020
DDC Class: 530 Physik
Subject(s): near-infrared spectroscopy
quantum optics
single photons
slow light
Sponsor/Funder: DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelemente
EC/H2020/679183/EU/Entanglement distribution via Semiconductor-Piezoelectric Quantum-Dot Relays/SPQRel
Journal Title: Scientific Reports
Publisher: Springer Nature
Publisher Place: London
Volume: 9
Article Number: 13728
Publisher DOI: 10.1038/s41598-019-50062-x
EISSN: 2045-2322
Appears in Collections:AG Optoelektronik und Quantenbauelemente » Publications

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