LUMINESCENCE STUDY OF CDTE CD1-XMNXTE QUANTUM-WELLS GROWN BY MBE/

We report on a study of photoluminescence from CdTe quantum wells (QW) surrounded by Cd1-xMnxTe barriers. Previous investigations of this QW system were limited to the Mn molar fraction x in the barriers not ex ceeding x approximate to 0.3, Here, the study includes samples in the entire range of the molar fraction 0.1 < x less than or equal to 1. Th e width of the investigated quantum wells ranged from 4 ML (similar to 13 Angstrom) to 30 ML (similar to 100 Angstrom). We report also on th e temperature dependence of the PL line position. The luminescence per sists up to room temperature evidencing a good quality of the samples even in the case of very deep QW, i.e. for wells and barriers differin g significantly in their lattice parameters. Finally, we compare the o bserved PL energies from quantum wells with different x with calculati ons based on the envelope function method assuming a square-well poten tial. The excitonic effect and the effect related to internal strains are taken into account. The scatter of the data does not exceed that e xpected for QW width fluctuation and/or interface Mn interdiffusion by +/- 1 ML.