Cathodoluminescence of single quantum wires and vertical quantum wells grown on a submicron grating

摘要

We present cathodoluminescence (CL) investigations of a corrugated GaAs/AlGaAs single quantum well (QW) structure grown on a submicron grating. The CL spectra have four distinct emission peaks. Using planhyphen;view and crosshyphen;sectional CL imaging together with crosshyphen;sectional transmission electron microscope imaging, we have assigned the four peaks: They originate in the nominal QW, a quantum wire (QWR), a vertical quantum well (VQW), and the barrier, respectively. We have CLhyphen;imaged and hyphen;characterized single QWRs and VQWs.