Exciton Spin Manipulation in InAs/GaAs Quantum Dots : Exchange Interaction and Magnetic Field Effects - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2005

Exciton Spin Manipulation in InAs/GaAs Quantum Dots : Exchange Interaction and Magnetic Field Effects

M. Sénès
  • Fonction : Auteur
B. Urbaszek
Xavier Marie
Thierry Amand
J. Tribollet
  • Fonction : Auteur
Frédéric Bernardot
  • Fonction : Auteur
  • PersonId : 841816
J.-M. Gérard
  • Fonction : Auteur

Résumé

We report quantum beat phenomena between different polarization states in InAs quantum dots, observed in time-resolved photoluminescence and transient dichroism measurements. The polarization of the emitted light can be changed from linear to circular by applying a small magnetic field. Following quasiresonant excitation the electron and hole spin states remain stable during the exciton lifetime, independent of the applied magnetic field. We show that the exciton spin coherence is partially preserved in the energy relaxation process. These experiments enable us to measure the anisotropic exchange energy delta(Exy) and the exciton g factor. We find delta(Exy)30 µeV and g2.5 for the quantum dot excitons.
Fichier non déposé

Dates et versions

hal-00016796 , version 1 (11-01-2006)

Identifiants

Citer

M. Sénès, B. Urbaszek, Xavier Marie, Thierry Amand, J. Tribollet, et al.. Exciton Spin Manipulation in InAs/GaAs Quantum Dots : Exchange Interaction and Magnetic Field Effects. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2005, 71, pp.115334. ⟨10.1103/PhysRevB.71.115334⟩. ⟨hal-00016796⟩
51 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More