Raman scattering by optical phonons in In1-y-zAlyGazAs lattice matched to InP

Borroff, R.; Merlin, R.; Chin, A.; Bhattacharya, P. K.
October 1988
Applied Physics Letters;10/24/1988, Vol. 53 Issue 17, p1652
Academic Journal
We report on Raman scattering by longitudinal optical phonons in In1-y-zAlyGazAs (1-y-z=0.53) lattice matched to InP. The quaternary alloys were grown on (001) InP by molecular beam epitaxy. The phonon spectra exhibit three-mode behavior. The frequencies of AlAs- and GaAs-like modes vary linearly with the concentration of Al (or Ga) while the position of the InAs-like phonon remains nearly constant. The data show no evidence of alloy clustering.


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