Intersubband scattering and thermalization of electrons in GalnAs/AlInAs quantum wells studied by femtosecond infrared spectroscopy

Stephan Lutgen, Robert Kaindl, Michael Woerner, Thomas Elsaesser, Andreas Hase, Harald Kunzel

Research output: Contribution to conferencePaperpeer-review

Abstract

The ultrafast dynamics of carriers in low-dimensional semiconductors is governed by inter- and intrasubband scattering processes resulting from carrier-carrier and carrier-phonon interactions. This paper reports on femtosecond studies of electron dynamics occurring after optical excitation to a higher conduction subband in GaInAs/ AlInAs quantum wells. Results demonstrate a lifetime of the n = 2 conduction subband of 1 ps and give the first direct insight into the relatively slow electron thermalization after intersubband excitation.

Original languageEnglish (US)
Pages176-177
Number of pages2
StatePublished - 1996
Externally publishedYes
EventProceedings of the 1996 6th Quantum Electronics and Laser Science Conference, QELS - Anaheim, CA, USA
Duration: Jun 2 1996Jun 7 1996

Conference

ConferenceProceedings of the 1996 6th Quantum Electronics and Laser Science Conference, QELS
CityAnaheim, CA, USA
Period6/2/966/7/96

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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