Abstract
The optical absorbance, refractive index and absorption edge of vapour deposited amorphous Sb 2S 3 films are studied systematically as a function of annealing temperature in the range 160°C > T > 23°C. As deposited films continuously loose sulphur above 60°C as determined by ESCA and this loss affects their measured optical properties. Modification of optical properties upon heating to T = 160°C opens the possibility of a WORM (write once read many times) kind of optical storage as demonstrated in laser irradiation experiment.
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