Cesium-Vapor-Based Delay of Single Photons Emitted by Deterministically Fabricated Quantum Dot Microlenses

Title
Cesium-Vapor-Based Delay of Single Photons Emitted by Deterministically Fabricated Quantum Dot Microlenses
Authors
송진동박석인Lucas BremerSarah FischbachSven RodtTobias HeindelStephan Reitzenstein
Keywords
Cesium; Single Photons; Delay
Issue Date
2020-02
Publisher
Advanced quantum technologies
Citation
VOL 3, NO 2-1900071-8
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.
URI
http://pubs.kist.re.kr/handle/201004/70363
ISSN
2511-9044
Appears in Collections:
KIST Publication > Article
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