Magnetic-field enhancement of the exciton-polariton splitting in a semiconductor quantum-well microcavity: The strong coupling threshold

J. Berger, O. Lyngnes, H. Gibbs, G. Khitrova, T. Nelson, E. Lindmark, A. Kavokin, M. Kaliteevski

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

We investigate the influence of strong magnetic confinement on an exciton coupled to the resonant mode of a semiconductor microcavity. Cavity mode coupling to a variety of discrete exciton resonances is described in direct relation to the quantum-well magnetoabsorption spectra. We show that the magnetic-field-enhanced vacuum Rabi splitting and time-resolved oscillation frequency obey the predicted square-root dependence on the exciton oscillator strength computed directly from the integrated absorption spectra. Anticrossing curves measured in zero field and in 11.25 T evidence an interesting three-oscillator coupling observable only at high fields due to enhanced higher-order light-hole-exciton transitions. The data are in excellent agreement with a theoretical model which deduces magnetic-field-dependent oscillator strengths and corresponding reflectance spectra from a variational calculation combined with a transfer matrix method.

Original languageEnglish (US)
Pages (from-to)1975-1981
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number3
DOIs
StatePublished - Jan 1 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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