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Exciton spin decay in quantum dots to bright and dark states

Title data

Roszak, Katarzyna ; Axt, Vollrath M. ; Kuhn, Tilmann ; Machnikowski, Paweł:
Exciton spin decay in quantum dots to bright and dark states.
In: Physical Review B. Vol. 76 (2007) Issue 19 . - No.195324, 6 Seiten.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.76.195324

Project information

Project financing: Deutscher Akademischer Austauschdienst
Deutsche Forschungsgemeinschaft
Polish MNiSW Grant (No. N202 1336 33)

Abstract in another language

We study the phonon influence on the spin of an exciton confined in a quantum dot. A process causing the transition of an initial bright heavy hole exciton spin state to dark states is identified. For a set of parameters typical for InAs∕GaAs self-assembled quantum dots the corresponding decay times are over two orders of magnitude faster than for the previously studied transition between bright states and are comparable to exciton lifetimes already at temperatures of several tens of Kelvins.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; non-linear optics; ultrafast dynamics; phonons; excitons; Pikus Bir interaction; spin-orbit coupling; dark states; short range exchange interaction; spin relaxation; exciton spin; semiconductor spintronics
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: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 25 Oct 2017 08:16
Last Modified: 30 Oct 2017 09:52
URI: https://eref.uni-bayreuth.de/id/eprint/40163