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2005 | 107 | 2 | 429-434
Article title

Dynamics of the Intraband Light Absorption in Selectively Doped GaAs/AlGaAs Quantum Wells

Content
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Languages of publication
EN
Abstracts
EN
Spectral and temperature dependences of equilibrium and non-equi-intersubband light absorption in the mid-infrared spectral range were studied in selectively doped asymmetrical tunnel-coupled GaAs/AlGaAs quantum wells. The temporal evolution of the absorption studied by means of a picosecond pump-probe technique was found to have a biexponential character. The fast decay times are determined by intersubband electron relaxation due to electron scattering by optical phonons and impurities. The presence of long decay times in transient mid-infrared absorption is probably connected with electron transitions from the states in barrier (X and L valleys as well as deep centers) to the states of the quantum well. Experimentally determined intersubband scattering times are compared with the calculated ones.
Keywords
EN
Publisher

Year
Volume
107
Issue
2
Pages
429-434
Physical description
Dates
published
2005-02
received
2004-08-22
Contributors
author
  • Saint Petersburg State Polytechnic University, St. Petersburg 195251, Russia
author
  • Saint Petersburg State Polytechnic University, St. Petersburg 195251, Russia
author
  • Saint Petersburg State Polytechnic University, St. Petersburg 195251, Russia
author
  • Saint Petersburg State Polytechnic University, St. Petersburg 195251, Russia
author
  • Saint Petersburg State Polytechnic University, St. Petersburg 195251, Russia
author
  • Institute of Physics, University of Bayreuth, Bayreuth 95440, Germany
author
  • Institute of Physics, University of Bayreuth, Bayreuth 95440, Germany
author
  • Institute of Physics, University of Bayreuth, Bayreuth 95440, Germany
author
  • Carnegie Mellon University, Pittsburgh PA 15213, USA
author
  • P.N. Lebedev Physical Institute RAS, Moscow 117924, Russia
References
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  • 3. V. Berger, E. Dupont, D. Delacourt, N. Vodjdani, M. Papuchon, Appl. Phys. Lett., 62, 1907, 1993
  • 4. B.F. Levine, J. Appl. Phys., 74, R1, 1993
  • 5. O. Gauthier-Lafaye, P. Boucaud, F.H. Julien, S. Sauvage, S. Cabaret, J.-M. Lourtioz, V. Thierry-Mieg, R. Planel, Appl. Phys. Lett., 71, 3619, 1997
  • 6. O. Gauthier-Lafaye, B. Seguin-Roa, F.H. Julien, P. Collot, C. Sirtori, J.Y. Duboz, G. Strasser, Physica E, 7, 12, 2000
  • 7. P.M. Mooney, T.N. Theis, Comments Condens. Matter Phys., 16, 167, 1992
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv107n242kz
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