Abstract
We have studied CdZnTe/ZnTe multiple quantum wells which have alloy wells and strained layers. Low-temperature Raman spectra reveal a strain-induced shift of the longitudinal optic phonon energy consistent with a strain coherently shared between well and barrier layers. In resonant Raman profiles, we observe strong incoming and outgoing resonances at the n=1 heavy hole exciton transition that are well correlated with features in the photoluminescence and excitation spectra. Scattering by the CdTe-like phonon indicates an energy range for exciton localization by alloy fluctuations. The behavior of the ZnTe-like phonon near resonance is interpreted with exciton-polariton relaxation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have