Non-equilibrium spin noise spectroscopy of a single quantum dot operating at fiber telecommunication wavelengths

authored by: Tian Jiao Sun, P. Sterin, L. Lengert, C. Nawrath, M. Jetter, P. Michler, Yang Ji, J. Hübner, M. Oestreich
Abstract: We report on the spin and occupation noise of a single, positively charged (InGa)As quantum dot emitting photons in the telecommunication C-band. The spin noise spectroscopy measurements are carried out at a temperature of 4.2 K in dependence on intensity and detuning in the regime beyond thermal equilibrium. The spin noise spectra yield in combination with an elaborate theoretical model the hole-spin relaxation time of the positively charged quantum dot and the Auger recombination and the electron-spin relaxation time of the trion state. The extracted Auger recombination time of this quantum dot emitting at 1.55 μm is comparable to the typical Auger recombination times on the order of a few μs measured in traditionally grown InAs/GaAs quantum dots emitting at around 900 nm.
Organisation(s): Institute of Solid State Physics
Nanostructures Section
QuantumFrontiers
External Organisation(s): CAS - Institute of Semiconductors
University of the Chinese Academy of Sciences (UCAS)
University of Stuttgart
Type: Article
Journal: Journal of applied physics
Volume: 131
ISSN: 0021-8979
Publication date: 14.02.2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy(all)
Electronic version(s): https://doi.org/10.1063/5.0078910 (Access: Open)

BibTeX

@article{20983a1fffba49b1a64a33bed4455d05,
title = "Non-equilibrium spin noise spectroscopy of a single quantum dot operating at fiber telecommunication wavelengths",
abstract = "We report on the spin and occupation noise of a single, positively charged (InGa)As quantum dot emitting photons in the telecommunication C-band. The spin noise spectroscopy measurements are carried out at a temperature of 4.2 K in dependence on intensity and detuning in the regime beyond thermal equilibrium. The spin noise spectra yield in combination with an elaborate theoretical model the hole-spin relaxation time of the positively charged quantum dot and the Auger recombination and the electron-spin relaxation time of the trion state. The extracted Auger recombination time of this quantum dot emitting at 1.55 μm is comparable to the typical Auger recombination times on the order of a few μs measured in traditionally grown InAs/GaAs quantum dots emitting at around 900 nm.",
author = "Sun, {Tian Jiao} and P. Sterin and L. Lengert and C. Nawrath and M. Jetter and P. Michler and Yang Ji and J. H{\"u}bner and M. Oestreich",
note = "Funding Information: We acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy—EXC-2123 QuantumFrontiers—390837967, and OE 177/10-2. T.-J.S. acknowledges financial support by the China Scholarship Council (CSC). C.N., M.J., and P.M. gratefully acknowledge the funding by the German Federal Ministry of Education and Research (BMBF) via the Project QR.X (No. 16KISQ013).",
year = "2022",
month = feb,
day = "14",
doi = "10.1063/5.0078910",
language = "English",
volume = "131",
journal = "Journal of applied physics",
issn = "0021-8979",
publisher = "American Institute of Physics",
number = "6",
}