Resonance Raman scattering by confined LO and TO phonons in GaAs-AlAs superlattices

A. K. Sood, J. Menéndez, M. Cardona, K. Ploog

Research output: Contribution to journalArticle

426 Scopus citations

Abstract

It is shown that in GaAs-AlAs superlattices the confined longitudinal-optic Raman phonons created via either deformation-potential or Fröhlich electron-phonon interaction are different. This effect is demonstrated by comparison of resonance and off-resonance Raman spectra. Phonons of A1 symmetry (point group D2d) dominate in resonance, while B2 phonons are stronger in the off-resonance case. The resonance profile of the A1 modes is discussed. We also report the observation of confined transverse-optic phonons under extremely resonant conditions.

Original languageEnglish (US)
Pages (from-to)2111-2114
Number of pages4
JournalPhysical Review Letters
Volume54
Issue number19
DOIs
StatePublished - Jan 1 1985
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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