Magneto-Luminescence in GaAs-(GaAl)As Superlattices
During the past few years it has become possible to grow systems consisting of alternate layers of different semiconductors with controlled thicknesses and relatively sharp interfaces. These one-dimensional periodic structures, generally referred to as superlattices, are most extensively studied in the system built with alternate layers of GaAs and (GaAl)As. It has been reported by many authors that due to the quantum size effect excitons have a character different from that in bulk material /l/. The exciton becomes quasi-two dimensional, its binding energy is enhanced, the degeneracy of heavy- and light-hole band is removed, resulting in two exciton systems.
KeywordsGaAs Lution Tate
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