Experimental observation and study of light induced relief gratings in chalcogenide glasses is presented. Holographic exposure of the glass film by near bandgap light leads to a real-time periodic thickness self-expansion without further processing. The dynamics of surface modulation is not monotone with respect to the exposition. These modulations demonstrate a strong memory effect, but can be erased by heating near the glass transition temperature.
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Galstyan et al. (1997) studied this question.
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