Nonlinear intersubband absorption of a hot quasi-two-dimensional electron plasma studied by femtosecond infrared spectroscopy

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

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The transient ((Formula presented)) to ((Formula presented)) intersubband absorption of a pure electron plasma in (Formula presented)-type (Formula presented)(Formula presented)As/(Formula presented)(Formula presented)As quantum wells is studied in femtosecond pump-probe experiments. The ultrafast dynamics of nonlinear absorption shows strong changes when tuning the midinfrared pulses over the intersubband absorption line. The nonlinear optical response is determined by both intersubband relaxation with a time constant of 1.3 ps and the intraband dynamics of ((Formula presented)) electrons, which are monitored in an independent experiment.

Original languageEnglish (US)
Pages (from-to)R17343-R17346
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number24
DOIs
StatePublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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