Ultrafast dynamics of nonlinear intersubband absorption in n-type modulation doped GaInAs/AlInAs quantum wells

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

Research output: Contribution to journalArticlepeer-review

Abstract

The nonlinear intersubband absorption of a quasi-two-dimensional electron plasma in n-type modulation doped Ga0.47In0.53As/Al0.48In0.52As multiple quantum wells is investigated by femtosecond pump-probe measurements in the mid-infrared. We observe a strong dependence of the transient nonlinear intersubband absorption on the spectral position of the pulses within the intersubband absorption line. The time-resolved measurements demonstrate that the absorption dynamics is determined not only by intersubband relaxation with a time constant of 1.3 ps but also by the intrasubband thermalization and subsequent cooling of the n = 1 electron distribution.

Original languageEnglish (US)
Pages (from-to)212-214
Number of pages3
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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