Signatures of correlations in intensity-dependent excitonic absorption changes

T. Meier, Stephan W Koch, P. Brick, C. Ell, Galina Khitrova, H. M. Gibbs

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36 Citations (Scopus)

Abstract

The intensity dependence of pump-induced excitonic absorption changes is studied in high-quality In0.04Ga0.96As 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
StatePublished - 2000

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Excitons
excitons
signatures
Pumps
Polarization
pumps
Stark effect
polarization characteristics
bleaching
Bleaching
Semiconductor quantum wells
pumping
quantum wells
saturation
LDS 751
polarization
configurations
excitation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Signatures of correlations in intensity-dependent excitonic absorption changes. / Meier, T.; Koch, Stephan W; Brick, P.; Ell, C.; Khitrova, Galina; Gibbs, H. M.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 62, No. 7, 2000, p. 4218-4221.

Research output: Contribution to journalArticle

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AU - Brick, P.

AU - Ell, C.

AU - Khitrova, Galina

AU - Gibbs, H. M.

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