Magneto-Optical Properties of ZnMnSe-ZnSe-ZnCdSe Quantum Structures

We have studied the circularly polarized photoluminescence (PL) and reflectance properties of a series of ZnSe/ZnCdSe/ZnSe/ZnMnSe single quantum wells (SQWs) and ZnSe/ZnCdSe/ ZnSe/ZnCdMnSe /ZnSe coupled double quantum wells (DQWs). The degree of circular polarization of the exciton luminescence from the ZnCdSe non-magnetic semiconductor (NMS) well was studied as a function of the spacer layer thickness and the exciton energies in the NMS and the diluted magnetic semiconductor (DMS) regions. The polarization degree became larger as the spacer thickness became smaller. The polarization also depended on the exciton energies in the NMS and the DMS regions and became larger as the exciton energy in the ZnCdSe well became closer to that in the DMS layer or the DMS well.