title: Tuning the exciton binding energies in single self-assembled InGaAs/GaAs quantum dots by piezoelectric-induced biaxial stress.
abstract: We study the effect of an external biaxial stress on the light emission of single InGaAs/GaAs(001) quantum dots placed onto piezoelectric actuators. With increasing compression, the emission blueshifts and the binding energies of the positive trion (X+) and biexciton (XX) relative to the neutral exciton (X) show a monotonic increase. This phenomenon is mainly ascribed to changes in electron and hole localization and it provides a robust method to achieve color coincidence in the emission of X and XX, which is a prerequisite for the possible generation of entangled photon pairs via the recently proposed "time reordering" scheme.
authors.affiliation: Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany. f.ding@ifw-dresden.de
authors.forename: F
authors.initials: F
authors.lastname: Ding
authors.forename: R
authors.initials: R
authors.lastname: Singh
authors.forename: J D
authors.initials: JD
authors.lastname: Plumhof
authors.forename: T
authors.initials: T
authors.lastname: Zander
authors.forename: V
authors.initials: V
authors.lastname: Krápek
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen
authors.forename: M
authors.initials: M
authors.lastname: Benyoucef
authors.forename: V
authors.initials: V
authors.lastname: Zwiller
authors.forename: K
authors.initials: K
authors.lastname: Dörr
authors.forename: G
authors.initials: G
authors.lastname: Bester
authors.forename: A
authors.initials: A
authors.lastname: Rastelli
authors.forename: O G
authors.initials: OG
authors.lastname: Schmidt