• Rapid Communication

Zeeman splitting of excitons and biexcitons in single In0.60Ga0.40As/GaAs self-assembled quantum dots

A. Kuther, M. Bayer, A. Forchel, A. Gorbunov, V. B. Timofeev, F. Schäfer, and J. P. Reithmaier
Phys. Rev. B 58, R7508(R) – Published 15 September 1998
PDFExport Citation

Abstract

Self-assembled In0.60Ga0.40As/GaAs quantum dots have been studied by single dot photoluminescence spectroscopy at T=1.5K. Emission from the biexciton state is observed, for which we find a binding energy of 3.1 meV. In magnetic field we observe equal Zeeman splittings for the exciton and biexciton spectral lines. The splitting of the biexciton emission is given by the splitting of the exciton in the final state of the biexciton transition. The circular polarization of the quantum dot luminescence decreases with increasing magnetic field, although the spin splitting is clearly larger than the thermal energy. This indicates that the spin relaxation is strongly suppressed in these quantum dots.

  • Received 29 May 1998

DOI:https://doi.org/10.1103/PhysRevB.58.R7508

©1998 American Physical Society

Authors & Affiliations

A. Kuther, M. Bayer, and A. Forchel

  • Technische Physik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany

A. Gorbunov and V. B. Timofeev

  • Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia

F. Schäfer and J. P. Reithmaier

  • Technische Physik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany

References (Subscription Required)

Click to Expand
Issue

Vol. 58, Iss. 12 — 15 September 1998

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×