Abstract
Structural properties of short period ( <30 Å) ZnTe-ZnS strained-layer superlattices (SLSs) have been examined by Raman spectroscopy and low temperature photoluminescence (PL). The longitudinal optical (LO) phonon of ZnS shows a stress-induced frequency shift, which is in close agreement with theoretical calculation. Although ZnTe LO phonon frequency shifts depending on the SLS structure, there is a discrepancy between experiment and calculation, implying a relaxation in the layer. PL spectra are dominated by one intense peak, and the peak energy shows a trend to shifts according to layer thicknesses and SL period as expected from Kronig-Penney model, but the energy value is lower.