Theory of coherent effects in semiconductors

S. W. Koch, C. Sieh, T. Meier, F. Jahnke, A. Knorr, P. Brick, M. Hübner, C. Ell, J. Prineas, G. Khitrova, H. M. Gibbs

Research output: Contribution to journalConference articlepeer-review

32 Scopus citations

Abstract

A microscopic theory is applied to discuss coherent excitation effects in semiconductors. The theory is evaluated to analyze ultrafast absorption changes around the exciton resonance in semiconductor quantum-well structures where the relative strength of the different many-body contributions can be manipulated by proper selection of pump and probe polarizations. For two-band systems and oppositely circular polarization it is shown that Coulombic correlation dynamics dominates the optical response. As a consequence, the optical Stark effect in this configuration corresponds to a red shift of the exciton resonance in striking contrast to the usual atomic-like blue shift. The predictions are confirmed by experiments using high-quality InGaAs quantum-well systems.

Original languageEnglish (US)
Pages (from-to)1-6
Number of pages6
JournalJournal of Luminescence
Volume83-84
DOIs
StatePublished - Jan 1 1999
EventProceedings of the 1999 12th International Conference on Dynamical Processes in Excited States of Solids - Humacao, PR, United States
Duration: May 23 1999May 27 1999

Keywords

  • Coherent spectroscopy
  • Electronic correlations
  • Optical stark effect

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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