II-VI Quantum Wells with High Carrier Densities and in High Magnetic Fields

Optical properties of a two-dimensional electron gas in ZnSe/(Zn,Be,Mg)Se quantum well structures have been examined by means of photoluminescence and reflectivity techniques in external magnetic fields up to 50 T. For the studied structures, the Fermi energy of the two-dimensional electron gas falls in the range between the trion binding energy and the exciton binding energy, which keeps the dominating role of Coulombic interactions between electrons and photoexcited holes. Characteristic peculiarities of the optical spectra are discussed.