Excitonic Polaritons in Transverse Magnetic Fields

• Authors: D. Loginov , V. Kochereshko , A. Litvinov , L. Besombes , H. Mariette , J. Davies , L. Smith , D. Wolverson
• Languages of publication: EN

Abstracts

EN

Reflectivity spectra taken from wide quantum wells based on CdTe/CdZnTe and GaAs/AlGaAs (in which the well width is much larger than the exciton Bohr radius) were studied in magnetic fields in the plane of the well (the Voigt geometry). The energy splitting between bright and dark excitons and the redistribution of the oscillator strength from bright to dark was observed and this allowed us to determine the exciton exchange constantΔ. We found that exciton translational mass depends on the value of magnetic field. Additionally, we found that diamagnetic shift also depends on exciton wave vector. Changes in the spectra in the range of the overlap of heavy and light hole exciton resonances were observed when the magnetic field was inverted. Theoretical modeling of the spectra allowed us to explain all the observed features in the reflectivity spectra and to determine some material parameters.

Keywords

EN

71.35.-y; 71.35.Ji; 78.20.Ls; 78.67.De

Discipline

• 78.20.Ls: Magneto-optical effects(for magneto-optical devices, see 85.70.Sq)
• 78.67.De: Quantum wells
• 71.35.Ji: Excitons in magnetic fields; magnetoexcitons
• 71.35.-y: Excitons and related phenomena

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 2
• Pages: 381-386

Dates

published

2007-08

received

2007-06-09

Contributors

author

D. Loginov

• V.A. Fock Institute of Physics, St. Petersburg State University, 198904 St. Petersburg, Russia

author

V. Kochereshko

• A.F. Ioffe Physico-Technical Institute RAS, 194021 St. Petersburg, Russia

author

A. Litvinov

• A.F. Ioffe Physico-Technical Institute RAS, 194021 St. Petersburg, Russia

author

L. Besombes

• Laboratoire de Spectrométrie Physique, Université Joseph Fourier de Grenoble, Grenoble, France

author

H. Mariette

• Laboratoire de Spectrométrie Physique, Université Joseph Fourier de Grenoble, Grenoble, France

author

J. Davies

• Department of Physics, University of Bath, BA2 7AY Bath, UK

author

L. Smith

• Department of Physics, University of Bath, BA2 7AY Bath, UK

author

D. Wolverson

• Department of Physics, University of Bath, BA2 7AY Bath, UK

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Identifiers

DOI

10.12693/APhysPolA.112.381