Abstract
GaAs/Al x Ga 1− x As coupled double quantum wells (CDQW) separated by thin AlAs barrier have been investigated by photoluminescence excitation (PLE) and photoreflectance (PR) spectroscopies in magnetic fields up to 6 T. We have focused on excitonic transitions between confined hole states and electron resonant states above Al x Ga 1− x As barrier. The spatial extents of excitons involving resonant state electrons have been estimated from diamagnetic shifts of observed transitions. Determined values have been compared with the respective values of fundamental confined state excitons.
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