Optical Transitions, Excitons, and Polaritons in Bulk and Low-Dimensional Semiconductor Structures

  • Lucio Claudio Andreani
Part of the NATO ASI Series book series (NSSB, volume 340)

Abstract

Electrons in solids are subject to the crystal potential, as well as to the mutual electronelectron interaction. The resulting quantum-mechanical system represents a many-body problem of great complexity. In weakly-correlated systems like the usual semiconductors, a good starting point is provided by the one-particle picture, in which the crystal eigenstates are approximated by Slater determinants where the electrons occupy the one-particle eigenstates called band levels. This is only an approximate picture, since the electron-electron interaction yields corrections to the excited-state spectrum of the crystal. In particular, two-particle excitations called excitons arise at energies below the band gap, and excitonic corrections are found also at energies above the band gap.

Keywords

Zinc Permeability Attenuation Recombination Coherence 

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Lucio Claudio Andreani
    • 1
  1. 1.Dipartimento di Fisica “A. Volta”Université degli Studi di PaviaPaviaItaly

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