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Linear and nonlinear excitonic absorption in semiconducting quantum wires crystallized in a dielectric matrix

  • V. S. Dneprovskii
  • E. A. Zhukov
  • E. A. Muljarov
  • S. G. Tikhodeev
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Abstract

Spectra of linear and nonlinear absorption of GaAs and CdSe semiconducting quantum wires crystallized in a transparent dielectric matrix (inside chrysotile-asbestos nanotubes) have been measured. Their features are interpreted in terms of excitonic transitions and filling of the exciton phase space in the quantum wires. The theoretical model presented here has allowed us to calculate the energies of excitonic transitions that are in qualitative agreement with experimental data. The calculated exciton binding energies in quantum wires are a factor of several tens higher than in bulk semiconductors. The cause of this increase in the exciton binding energy is not only the size quantization, but also the “dielectric enhancement,” i.e., stronger attraction between electrons and holes owing to the large difference between permittivities of the semiconductor and dielectric matrix.

Keywords

GaAs Field Theory Phase Space Elementary Particle Quantum Field Theory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© American Institute of Physics 1998

Authors and Affiliations

  • V. S. Dneprovskii
    • 1
  • E. A. Zhukov
    • 1
  • E. A. Muljarov
    • 2
  • S. G. Tikhodeev
    • 2
  1. 1.M. V. Lomonosov Moscow State UniversityMoscowRussia
  2. 2.Institute of General PhysicsRussian Academy of SciencesMoscowRussia

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