Resonance Raman Scattering by Confined LO and TO Phonons in GaAs-AlAs Superlattices
- 13 May 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 54 (19), 2111-2114
- https://doi.org/10.1103/physrevlett.54.2111
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 symmetry (point group ) dominate in resonance, while phonons are stronger in the off-resonance case. The resonance profile of the modes is discussed. We also report the observation of confined transverse-optic phonons under extremely resonant conditions.
Keywords
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