A reversible optical transition in SeGe and PSeGe glasses

TLDR: In this paper, a reversible optical transition has been found in thin films of SeGe and PSeGe glasses. But the authors did not consider the presence of arsenic in these glasses.

Abstract: A reversible optical transition has been found in thin films of SeGe and PSeGe glasses. This optical transition is similar to that found in AsSeGe and AsSeSGe glass films; heating causes the shift of the absorption edge to shorter wavelengths, and illumination moves it to longer wavelengths without crystallization. It was found that the presence of arsenic is not always necessary. Fundamental optical properties of these glasses, i.e. absorption constant, optical energy gap, change of the optical energy gap, and the refractive index by heating and illumination are reported. Change of the optical energy gap and the refractive index is small in SeGe and PSeGe glasses, compared with that in AsSeGe and AsSeSGe glasses.