Signatures of correlations in intensity-dependent excitonic absorption changes

T. Meier, S. Koch, P. Brick, C. Ell, G. Khitrova, H. Gibbs

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

The intensity dependence of pump-induced excitonic absorption changes is studied in high-quality (Formula presented) quantum wells for different detunings and polarization configurations. For resonant excitation with increasing pump intensity a saturation of both the exciton bleaching and the induced absorption due to two-exciton resonances is observed, whereas for pumping below the exciton a characteristic polarization dependence of higher-order contributions to the optical Stark effect is found. Microscopic calculations including Coulomb correlations show that the experimental observations can be described by the coherent dynamics of single- and two-exciton resonances up to fifth order in the optical field.

Original languageEnglish (US)
Pages (from-to)4218-4221
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number7
DOIs
StatePublished - Jan 1 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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