EXCITON-ELECTRON INTERACTIONS IN CDTE CDMGTE MODULATION-DOPED QW STRUCTURES/

Reflectance, photoluminescence and photoluminescence excitation spectr a have been studied in modulation-doped CdTe/(Cd,Mg)Te quantum well st ructures containing a 2DEG of low density. Optical transitions related to the creation of excitons, bound exciton-electron complexes (trions ) and exciton-cyclotron resonance (ExCR) states have been found in the se spectra. A modification of the high-energy tail on the exciton abso rption line into several discrete ExCR lines was observed when a magne tic field was applied. The polarization of the exciton and ExCR reflec tance lines has been analyzed. (C) 1998 Elsevier Science B.V. All righ ts reserved.