Identification of electron-hole transitions in short-period GaAs/AlAs superlattices by time-resolved photoluminescence

摘要

Abstract: Temporal characteristics of the carriers recombination were investigated in different types of GaAs/AlAs superlattices by the time-resolved photoluminescence spectroscopy. The peculiarities of the electron-hole transitions were established for the superlattices studied in the dependence of the superlattice type and the width of quantum well and barrier layers. In particular, the conditions of existence of free and localized on the interface roughness excitons were found.!11