Quantum kinetic exciton-LO-phonon interaction in CdSe

Ulrike Woggon, Frank Gindele, Wolfgang Langbein, Jørn Märcher Hvam

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Abstract

Oscillations with a period of similar to 150 fs are observed in the four-wave mixing (FWM) signal of bulk CdSe and interpreted in terms of non-Markovian exciton-LO-phonon scattering. The experiments show evidence of phonon quantum kinetics in semiconductors of strong polar coupling strength and high exciton binding energy. By comparison of the spectral and temporal response of the FWM signal in bulk CdSe and CdSe quantum dots, we demonstrate the influence of continuum states on the interference of electron-hole pair polarizations coupled via an LO phonon.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume61
Issue number3
Pages (from-to)1935-1940
ISSN0163-1829
DOIs
Publication statusPublished - 2000

Bibliographical note

Copyright (2000) by the American Physical Society.

Keywords

  • SEMICONDUCTORS
  • SCATTERING
  • MEMORY
  • PHASE COHERENCE
  • DYNAMICS
  • NANOCRYSTALS
  • BULK GAAS
  • INTERACTION-INDUCED NONLINEARITIES
  • DEPENDENCE
  • CONTINUUM CONTRIBUTION

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