Transient oscillations in the vicinity of excitons and in the band of semiconductors

J. P. Sokoloff, M. Joffre, B. Fluegel, D. Hulin, M. Lindberg, S. W. Koch, A. Migus, A. Antonetti, N. Peyghambarian

Research output: Contribution to journalArticlepeer-review

74 Scopus citations


Several semiconductor materials, including CdS, CdSe, GaAs, and GaAs-AlxGa1-xAs multiple quantum wells were studied with use of femtosecond pump-probe spectroscopy. Oscillatory structures are observed in the differential transmission spectra of the probe pulse at the very early times when the probe pulse precedes the pump pulse. In addition to oscillations around the exciton frequency when pumping is either above or below the exciton, oscillatory structures are also observed in the vicinity of the pump frequency when the pump is tuned inside the semiconductor band. A semiclassical theory qualitatively explains the observed data. These oscillations are found to be the precursors of spectral hole burning (oscillations around the pump for pumping into the band), exciton bleaching (oscillations around exciton for pumping into the band) and exciton optical Stark shift (oscillations around exciton for pumping below the band).

Original languageEnglish (US)
Pages (from-to)7615-7621
Number of pages7
JournalPhysical Review B
Issue number11
StatePublished - 1988

ASJC Scopus subject areas

  • Condensed Matter Physics


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