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Exciton spin decay in quantum dots : single and double phonon assisted transitions

Title data

Roszak, Katarzyna ; Machnikowski, Paweł ; Axt, Vollrath M. ; Kuhn, Tilmann:
Exciton spin decay in quantum dots : single and double phonon assisted transitions.
In: Physica Status Solidi C. Vol. 6 (2009) Issue 2 . - pp. 537-541.
ISSN 1610-1642
DOI: https://doi.org/10.1002/pssc.200880325

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

We study phonon assisted transitions leading to exciton spin decay in quantum dots. We concentrate on couplings specific to the hole (Bir-Pikus Hamiltonian) and the exciton as a whole (short-range exchange interaction). A system strongly confined in a self-assembled quantum dot is considered.We discuss single-phonon assisted processes arising from the interplay of these interactions and show the dominating role of transverse phonons. We have also found a new two-phonon assisted transition, connected with the interplay of different parts of the Bir-Pikus Hamiltonian in the presence of the singlet-triplet splitting.

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
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 09:48
Last Modified: 30 Oct 2017 09:48
URI: https://eref.uni-bayreuth.de/id/eprint/40191