MBE-growth of a GeCoSi2Si heterostructure for vertical metalsemiconductormetal photodetectors
We report on the growth and structural characterisation of a novel single crystalline, epitaxial GeCoSi2Si(111) heterostructure suitable for the fabrication of a vertical metalsemiconductormetal photodetector for the wavelength of 1.55 ?m. The CoSi2 layer was grown by a special epitaxy method, named allotaxy. The Ge layer was grown by surfactant-mediated epitaxy. The growth parameters for the CoSi2 layer were optimised in order to suppress the formation of pinholes. A thin layer of silicon and Sb as a surfactant allowed layer-by-layer growth of Ge on the CoSi2 layer.
silicides molecular beam allotaxy surfactant mediated epitaxy infrared detector