M. Gurioli et al., RESONANT RAYLEIGH-SCATTERING IN SEMICONDUCTOR STRUCTURES, Nuovo cimento della Societa italiana di fisica. D, Condensed matter,atomic, molecular and chemical physics, biophysics, 17(11-12), 1995, pp. 1487-1492
A detailed study of the relative role played by localized and/or propa
gating intermediate excitonic states in resonant Rayleigh scattering (
RRS) is presented for a large set of GaAs quantum well (QW) and bulk s
tructures. We show that the two kinds of states contribute to RRS thro
ugh different mechanisms. We conclude that RRS occurs via localized st
ates in QW heterostructures, very likely due to localization by the in
terface roughness, while bulk crystals turn out to be better candidate
s for RRS via propagating states.