Rabi flopping of charge and spin currents generated by ultrafast two-colour photoexcitation of semiconductor quantum wells

B. Pasenow, H. T. Duc, T. Meier, S. W. Koch

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Charge and spin currents generated by ultrafast two-colour laser excitation of semiconductor quantum wells are computed using Bloch equations formulated in the basis of k {dot operator} p wave functions. The optically induced interband and intraband excitations are treated nonperturbatively for a consistent description of phototransport in the high-excitation regime. The analysis shows that the photoexcited charge and spin currents depend on the amplitudes of the incident ω and 2 ω beams in a highly nonlinear fashion. It is predicted that Rabi flopping should be observable experimentally leading to intensity-dependent changes of the current directions.

Original languageEnglish (US)
Pages (from-to)61-65
Number of pages5
JournalSolid State Communications
Volume145
Issue number1-2
DOIs
StatePublished - Jan 1 2008

Keywords

  • A. Nanostructures
  • A. Semiconductors
  • D. Optical properties
  • E. Nonlinear optics

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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