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2005 | 107 | 2 | 250-255
Article title

Dynamics of the Electric Field in a GaAs/AlGaAs Superlattice after Femtosecond Optical Excitation: Application of Time-Resolved Spectroscopic Techniques

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Languages of publication
EN
Abstracts
EN
We apply time-resolved photocurrent and differential electroreflectance spectroscopy to study the evolution of the internal field in a GaAs/AlGaAs superlattice after pulsed optical excitation at low temperature. The electric field dynamics is investigated by tracing the spectral position of the Wannier-Stark transitions as a function of delay time. We determine the electron sweep-out time, extract detailed information about the picosecond-time-scale drift of the charge carriers by comparing the measured data with the results of semi-classical self-consistent model calculations, and evaluate the two experimental techniques with respect to their ability to provide information about the carrier and field dynamics.
Keywords
EN
Publisher

Year
Volume
107
Issue
2
Pages
250-255
Physical description
Dates
published
2005-02
received
2004-08-22
Contributors
author
  • Physikalisches Institut, J.W. Goethe-Universität, Frankfurt/Main 60054, Germany
author
  • Physikalisches Institut, J.W. Goethe-Universität, Frankfurt/Main 60054, Germany
author
  • Physikalisches Institut, J.W. Goethe-Universität, Frankfurt/Main 60054, Germany
author
  • Physikalisches Institut, J.W. Goethe-Universität, Frankfurt/Main 60054, Germany
  • Semiconductor Physics Institute, Vilnius 01108, Lithuania
author
  • Physikalisches Institut, J.W. Goethe-Universität, Frankfurt/Main 60054, Germany
  • Semiconductor Physics Institute, Vilnius 01108, Lithuania
author
  • Fraunhofer-Institut für Angewandte Festkörperphysik, Freiburg 79108, Germany
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv107n206kz
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