Coherent intersubband polarizations in a quasi-two-dimensional electron plasma studied by femtosecond four-wave-mixing in the mid-infrared

R. A. Kaindl, S. Lutgen, M. Woerner, T. Elsaesser, A. Hase, H. Künzel

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We present the first study of the ultrafast dynamics of coherent intersubband polarizations in a two-dimensional electron plasma using femtosecond four-wave-mixing in the mid-infrared. Experiments with modulation-doped GaInAs/AlInAs multiple-quantum-well samples of different doping concentrations show a fast decay of the coherent third-order intersubband polarization on a sub-500 fs time scale, depending strongly on carrier density and lattice temperature. Electron-electron scattering is identified as the main dephasing scattering mechanism.

Original languageEnglish (US)
Pages (from-to)27-30
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume204
Issue number1
DOIs
StatePublished - Nov 1997
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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