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Reiter, Doris ; Axt, Vollrath Martin ; Kuhn, Tilmann:
Optical signals of spin switching using the optical Stark effect in a Mn-doped quantum dot.
In: Physical Review B.
Bd. 87
(2013)
Heft 11
.
- 115430.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.87.115430
Abstract
The optically induced spin dynamics of a single Mn atom embedded into a single semiconductor quantum dot can be strongly influenced by using the optical Stark effect. The exchange interaction gives rise to simultaneous spin flips between the quantum dot electron and Mn. In the time domain, these flips correspond to exchange induced Rabi oscillations, which are typically off-resonant. By applying a detuned laser pulse, the states involved in the flipping can be brought into resonance by means of the optical Stark effect increasing the amplitude of the Rabi oscillations to one. In this paper, we study theoretically how this spin dynamics can be monitored in time-resolved spectroscopy. In the spectrum, the exchange interaction leads to a splitting of the exciton line into six lines, each corresponding to one of the six Mn spin states. The dynamical behavior of the Mn spin is reflected by the strength of the individual lines as a function of time. When an off-resonant optical pulse is applied, the spectral positions of the lines shift, but still the flipping dynamics is visible.
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | magnetic quantum dot; ultrafast dynamics; spintronics; exchange interaction; nonlinear optics; coherent control; optical control; spin control; all optical spin control; Mn doped quantum dot; spin switching; optical Stark effect; time-resolved spectroscopy; pump-probe; exchange interaction |
| Institutionen der Universität: | Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III > Lehrstuhl Theoretische Physik III - Univ.-Prof. Dr. Martin Axt Fakultäten Fakultäten > Fakultät für Mathematik, Physik und Informatik Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Eingestellt am: | 02 Nov 2017 13:34 |
| Letzte Änderung: | 03 Aug 2023 11:24 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/40252 |