GaAs/Ge Crystal Growth on Si and SiO2/Si Substrates

Abstract

ABSTRACTAn approach to the composite layer growth of GaAs/Ge on Si(100) and insulator–coated Si(100) has been investigated. To overcome a problem of antiphase disorder of GaAs occurring along with epitaxial growth on Ge, thermal etching on Ge surfaces in hydrogen was introduced just prior to the growth. Antiphase–domain–free GaAs grown on a Ge(100) wafer exhibited mirror surfaces, photoluminescence characteristics comparable to those of homoepitaxial layers, and low etch–pit densities. The autodoping of Ge into GaAs induced a highly doped interfacial layer several thousand angstroms thick. The present study also involves heteroepitaxial growth of Ge on Si by vacuum deposition and Ge crystal growth on insulating layers over Si by LESS method.