Quantum Confinement in GaAs Microcrystallites Embedded in SiO2 Thin Film
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Abstract
Semiconductor GaAs microcrystallites were embedded in SiO2 thin films by magnetron rf cosputtering technique. Structures of the thin films were characterized by transmission electron microscopy, x-ray diffraction and x-ray photoelectron microscopy. Average size of microcrystallites, depending on the substrate temperature during deposition, is 3-10nm. Absorption spectra of the films were measured. Blue shift of absorption edge was observed and discussed according to quantum confinement effect.
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