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1996 | 90 | 4 | 751-754
Article title

Fermi-Edge Singularity in Excitonic Spectra of Modulation Doped AlGaAs/GaAs Quantum Wells

Content
Title variants
Languages of publication
EN
Abstracts
EN
The dynamic response of an electron Fermi sea to the presence of optically generated holes gives rise to an enhanced interaction of correlated electron-hole pairs near the Fermi level, resulting in an enhanced oscillator strength for optical transitions, referred to as the Fermi-edge singularity. We studied this effect in modulation-doped quantum wells which provide confined dense Fermi sea, spatially separated from dopant atoms, easily accessible for investigations under low excitation conditions. The Fermi-edge singularity was observed in both photoluminescence and photoluminescence excitation experiments, although in the case of photoluminescence the samples had to be either co-doped with acceptors in the wells to provide necessary localization of holes or designed to allow for nearly resonant scattering between the electronic states near the Fermi energy and the next unoccupied subband of the 2D electron gas.
Keywords
EN
Publisher

Year
Volume
90
Issue
4
Pages
751-754
Physical description
Dates
published
1996-10
Contributors
author
  • Institute of Electron Technology, Al. Lotników 32/46, 02-668 Warsaw, Poland
author
  • Institute of Electron Technology, Al. Lotników 32/46, 02-668 Warsaw, Poland
author
  • Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
  • Institute of Electron Technology, Al. Lotników 32/46, 02-668 Warsaw, Poland
author
  • Department of Physics and Measurement Technology, Linköping University, 581 83 Linköping, Sweden
author
  • Department of Physics and Measurement Technology, Linköping University, 581 83 Linköping, Sweden
author
  • Department of Physics and Measurement Technology, Linköping University, 581 83 Linköping, Sweden
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv90z420kz
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