EXCITONIC EFFECTS IN DILUTED MAGNETIC SEMICONDUCTOR NANOSTRUCTURES

Excitonic properties and the dynamics are reported in quantum dots (QD s) and quantum wells (QW) of diluted magnetic semiconductors. Transien t spectroscopies of photoluminescence and nonlinear-optical absorption and emission have been made on these quantum nanostructures. The Cd1- xMnxSe QDs show the excitonic magnetic polaron effect with an increase d binding energy. The quantum wells of the Cd1-xMnxTe/ZnTe system disp lay fast energy and dephasing relaxations of the free and localized ex citons as well as the tunneling process of carriers and excitons in th e QWs depending on the barrier widths. The observed dynamics and the e nhanced excitonic effects are the inherent properties of the diluted m agnetic nanostructures. (C) 1998 American Institute of Physics.