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Spectral characteristics and dynamics of a light hole type quantum dot doped with a single Mn atom

Title data

Reiter, Doris ; Axt, Vollrath M. ; Kuhn, Tilmann:
Spectral characteristics and dynamics of a light hole type quantum dot doped with a single Mn atom.
In: Physica Status Solidi C. Vol. 9 (2012) Issue 5 . - pp. 1284-1287.
ISSN 1610-1642
DOI: https://doi.org/10.1002/pssc.201100185

Abstract in another language

For a single semiconductor quantum dot doped with a single Mn atom we study theoretically the spectral characteristics and dynamics under optical excitation. Because the Mn spin couples to the electron and hole spin of the quantum dot exciton via the exchange interaction, in the absorption spectrum instead of a single exciton line a set of lines appears. Here we consider a quantum dot with one conduction band and one light hole type valence band. Due to this untypical valence band structure a spectrum of twelve lines is seen at zero magnetic field. When a magnetic field is applied, the lines shift, cross and anticross. By an analysis of the corresponding eigenvalues and eigenfunctions as functions of the magnetic field more insight into the spectral behavior can be achieved. The exchange interaction furthermore opens the possibility for ultra fast control of the Mn spin via optical manipulation of the exciton. We analyze whether switching of the Mn spin can be optimized by the application of an external magnetic field.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; magnetic semiconductor; optical control; spectrum; coherent control; light holes
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: 30 Oct 2017 15:08
Last Modified: 30 Oct 2017 15:08
URI: https://eref.uni-bayreuth.de/id/eprint/40235