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Main Title: Cesium‐vapor‐based delay of single photons emitted by deterministically fabricated quantum dot microlenses
Author(s): Bremer, Lucas
Fischbach, Sarah
Park, Suk‐In
Rodt, Sven
Song, Jin‐Dong
Heindel, Tobias
Reitzenstein, Stephan
Type: Article
Language Code: en
Abstract: 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.
Issue Date: 12-Sep-2019
Date Available: 26-Feb-2020
DDC Class: 530 Physik
Subject(s): atomic vapors
deterministic fabrication
quantum dots
singlephoton sources
Sponsor/Funder: BMBF, 03V0630TIB, Entwicklung einer Halbleiterbasierten Einzelphotonenquelle für die Quanteninformationstechnologie
BMBF, 13N14876, Quantenkommunikations-Systeme auf Basis von Einzelphotonenquellen (QuSecure)
DFG, 43659573, SFB 787: Halbleiter - Nanophotonik: Materialien, Modelle, Bauelemente
TU Berlin, Open-Access-Mittel - 2019
Journal Title: Advanced Quantum Technologies
Publisher: Wiley
Publisher Place: Weinheim
Volume: 3
Issue: 2
Article Number: 1900071
Publisher DOI: 10.1002/qute.201900071
EISSN: 2511-9044
Appears in Collections:AG Optoelektronik und Quantenbauelemente » Publications

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