Ultraviolet‐excited photoluminescence and Raman scattering in Cd1−xMnxTe‐CdTe microstructures

Photoluminescence (PL) and Raman scattering from Cd1−xMnxTe‐CdTe superlattices (x=0.06, 0.23, and 0.45) have been excited for the first time by ultraviolet light of energy 3.4–3.7 eV. The PL spectra show the known confinement‐enhanced E0(Γ6,c−Γ8,v) transition and a new peak near the E0+Δ0(Γ6,c−Γ7,v) transition. Raman spectra resemble those from bulk Cd1−xMnxTe. Resonant or nearly resonant Raman scattering, manifested through phonon overtones, occurs near the E0+Δ0 and E1(Λ6,c−Λ4,5,v) transitions. A superlattice with extremely thin layers (16 A/21 A) shows good Raman spectral quality.