Plasma-related phonon-sideband emission in semiconductors

Alexej Chernikov, Christoph N. Böttge, Thomas Feldtmann, Sangam Chatterjee, Martin Koch, Mackillo Kira, Stephan W. Koch

Research output: Contribution to journalArticle

Abstract

The phonon-assisted recombination in bulk II-VI semi-conductors is analyzed by means of time-resolved photoluminescence spectroscopy. Experimental results on both CdS and CdSe clearly indicate that phonon-sideband emission is not exclusively attributed to the presence of excitons. The contributions of Coulombcorrelated electron-hole plasma to the phonon assisted recombination may be significant, depending on the excitation conditions. This observation is supported by a microscopic many-particle theory of interacting electrons, phonons, and photons. Our theoretical approach generalizes previous investigations by including both correlated and uncorrelated luminescence sources. Our findings contradict and expand the traditional picture of phonon-sideband emission.

Original languageEnglish (US)
Pages (from-to)1129-1132
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume8
Issue number4
DOIs
StatePublished - Apr 1 2011

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Keywords

  • Electron-hole plasma
  • Excitons
  • Phonon sidebands
  • Semiconductors

ASJC Scopus subject areas

  • Condensed Matter Physics

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