Two-way photoeffectlike occupancy dynamics in a single (InGa)As quantum dot

authored by: Pavel Sterin, Kai Hühn, Mikhail M. Glazov, Jens Hübner, Michael Oestreich
Abstract: We extend optical spin-noise spectroscopy on single (InGa)As quantum dots to high magnetic fields at which the splitting between the two optically active Zeeman branches of the positively charged quantum dot trion transition is significantly larger than the homogeneous linewidth. Under such conditions, the standard theoretical approximations concerning the decoupling of spin and charge dynamics are generally not valid anymore, and the Kerr rotation fluctuations show significantly richer detuning-dependent features in the spectral region between the two Zeeman-split resonances. A comparison of the experimental data with an extended theory suggests that the typical Auger recombination can be neglected at high magnetic fields in favor of a probe-laser-induced photoeffect that not only shuffles the resident hole out of the quantum dot but also activates acceptor-bound holes, which recharge the empty quantum dot.
Organisation(s): Institute of Solid State Physics
Laboratory of Nano and Quantum Engineering
QuantumFrontiers
Type: Article
Journal: Physical Review B
Volume: 108
ISSN: 2469-9950
Publication date: 08.09.2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Electronic version(s): https://doi.org/10.48550/arXiv.2302.09035 (Access: Open)
https://doi.org/10.1103/PhysRevB.108.125301 (Access: Closed)

BibTeX

@article{6fab3c9dde3b43feb1a330b7f1abc906,
title = "Two-way photoeffectlike occupancy dynamics in a single (InGa)As quantum dot",
abstract = "We extend optical spin-noise spectroscopy on single (InGa)As quantum dots to high magnetic fields at which the splitting between the two optically active Zeeman branches of the positively charged quantum dot trion transition is significantly larger than the homogeneous linewidth. Under such conditions, the standard theoretical approximations concerning the decoupling of spin and charge dynamics are generally not valid anymore, and the Kerr rotation fluctuations show significantly richer detuning-dependent features in the spectral region between the two Zeeman-split resonances. A comparison of the experimental data with an extended theory suggests that the typical Auger recombination can be neglected at high magnetic fields in favor of a probe-laser-induced photoeffect that not only shuffles the resident hole out of the quantum dot but also activates acceptor-bound holes, which recharge the empty quantum dot.",
author = "Pavel Sterin and Kai H{\"u}hn and Glazov, {Mikhail M.} and Jens H{\"u}bner and Michael Oestreich",
note = "Funding Information: We thank K. Pierz (PTB) for providing the sample. We thank R. H{\"u}ther for his invaluable technical assistance. This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy–EXC-2123 QuantumFrontiers–390837967 and OE 177/10-2. ",
year = "2023",
month = sep,
day = "8",
doi = "10.48550/arXiv.2302.09035",
language = "English",
volume = "108",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Institute of Physics",
number = "12",
}