Abstract
Photoluminescence from the [(CdTe) m/(ZnTe) n] ℓ/ZnTe (ℓ=2∼10) MQW system has been observed at various temperatures. The well region of the MQW system is composed of short-period strained layer superlattices (m,n=2∼4) and misfit dislocations are reduced by widely spreading the internal strain. Actual experimental data show that the full width at half maximum of the exciton line is very narrow and prove that this sample has very high quality. The PL line arising from valence band splitting due to internal strain is observed. The line has a tail on its low energy side. We make the suggestion that its origin is the disorder of atomic alignment at interfaces.
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