Spin decoherence of a confined exciton due to one- and two-phonon assisted transitions

Exciton spin decay in a self-assembled InAs/GaAs quantum dot is studied. The spin relaxation results from an interplay of two factors: the Bir-Pikus Hamiltonian and the short-range exchange interaction, leading to one- and two-phonon assisted transitions. We establish a hierarchy between the resulti...

Full description

Saved in:
Bibliographic Details
Published in:29th International Conference on the Physics of Semiconductors 2008-07, Vol.1199, p.413-414
Main Authors: Roszak, K, MacHnikowski, P, Axt, V M, Kuhn, T
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Exciton spin decay in a self-assembled InAs/GaAs quantum dot is studied. The spin relaxation results from an interplay of two factors: the Bir-Pikus Hamiltonian and the short-range exchange interaction, leading to one- and two-phonon assisted transitions. We establish a hierarchy between the resulting transition rates; the one-phonon assisted transition to dark states is the fastest process. We also show the dominating role of transverse phonons for all of the transitions.
ISSN:0094-243X