Ultrafast heating and cooling of electron plasmas in GaInAs/AlInAs quantum wells after intersubband excitation

Stephan Lutgen, Robert A. Kaindl, Michael Woerner, Andreas Hase, Harald Künzel

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Energy exchange between nonequilibrium carriers and a two-dimensional electron plasma and subsequent carrier cooling are studied in femtosecond pump-probe experiments, (n = 1) electrons excited to the (n = 2) conduction subband via the midinfrared intersubband transition undergo intersubband scattering and subsequently transfer a large amount of energy to unexcited (n = 1) electrons resulting in a hot Fermi distribution within 2 ps. The observed heating rate increases with the plasma density whereas the subsequent cooling proceeds within 40 ps by emission of optical phonons and is found to be density independent.

Original languageEnglish (US)
Pages (from-to)425-429
Number of pages5
JournalSolid State Communications
Volume106
Issue number7
DOIs
StatePublished - 1998
Externally publishedYes

Keywords

  • A. quantum wells
  • A. semiconductors
  • D. electron-electron interactions
  • D. electron-phonon interactions
  • E. time-resolved optical spectroscopies

ASJC Scopus subject areas

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

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