Details
| Original language | English |
|---|---|
| Article number | 125301 |
| Journal | Physical Review B |
| Volume | 108 |
| Issue number | 12 |
| Publication status | Published - 8 Sept 2023 |
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.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B, Vol. 108, No. 12, 125301, 08.09.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Two-way photoeffectlike occupancy dynamics in a single (InGa)As quantum dot
AU - Sterin, Pavel
AU - Hühn, Kai
AU - Glazov, Mikhail M.
AU - Hübner, Jens
AU - Oestreich, Michael
N1 - Funding Information: We thank K. Pierz (PTB) for providing the sample. We thank R. Hüther 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.
PY - 2023/9/8
Y1 - 2023/9/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85172415633&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2302.09035
DO - 10.48550/arXiv.2302.09035
M3 - Article
AN - SCOPUS:85172415633
VL - 108
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 12
M1 - 125301
ER -