ABSTRACT
We investigated exciton-spin relaxation in GaAs rectangular quantum wires (QWRs) with 12nm × l2nm and 19nm × l3nm cross-sections by time-resolved photoluminescence spectroscopy. In order to clarify effects of one-dimensional (1-D) confinement on the spin relaxation process, we compared spin-relaxation times of these QWRs with those of GaAs quantum wells (QWs) of various thicknesses. We found that QWRs exhibited longer spin-relaxation times than QWs in the low temperature region from 15 to 80 K presumably due to enhanced exciton-exciton collision in the narrow 1-D confinement structures.
