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Optical signals of spin switching using the optical Stark effect in a Mn-doped quantum dot

Title data

Reiter, Doris ; Axt, Vollrath M. ; Kuhn, Tilmann:
Optical signals of spin switching using the optical Stark effect in a Mn-doped quantum dot.
In: Physical Review B. Vol. 87 (2013) Issue 11 . - Art.Nr. 115430, 4 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.87.115430

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
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
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 02 Nov 2017 13:34
Last Modified: 02 Nov 2017 13:34
URI: https://eref.uni-bayreuth.de/id/eprint/40252