Performances of gallium arsenide on silicon substrate photoconductive detectors

Planar photoconductors made with GaAs on silicon substrate have been studied with respect to static and dynamic responsivities as well as noise levels in the 1 Hz - 100 kHz frequency range. The results obtained have led to the determination of the specific detectivity which in turn is compared to those of GaAs planar photoconductors and Si photodiodes.