Showing papers by "Royal Institute and Observatory of the Spanish Navy published in 1996"

On the Ag-photodissolution phenomenon in As0.35S0.65 chalcogenide glass films

Abstract: The results of a systematic study of the photodissolution of silver in As0.35S0.65 chalcogenide glass films are reported. The silver and chalcogenide glass films were prepared by thermal evaporation. The kinetics of the photodoping process have been investigated in detail by monitoring the time dependence of the electrical resistance of the Ag layer, under illumination by He-Ne laser light, with a view to the determination of the dependence of the electrical resistivity of the silver film on its thickness. In contrast with the behaviour found in other amorphous chalcogenide materials, an induction period was not observed before the onset of the photodissolution effect; instead, the process consisted of a phase of acceleration, followed by one of deceleration. The maximum photodissolution rate and duration of acceleratory period were studied as a function of the light intensity and of the temperature of the sample.