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A photo-stable chalcogenide glass

Guang Yang, Himanshu Jain, Ashtosh Ganjoo, Donghui Zhao, Yinsheng Xu, Huidan Zeng, and Guorong Chen

Open Access Open Access

Abstract

Photo-darkening and photo-bleaching are well known phenomena in As-Se and Ge-Se chalcogenide glasses, respectively. Consequently, a systematic dependence of photo-induced optical changes in GexAs45-xSe55 glass series on x is expected between these two extremes. This prediction of photosensitivity on Ge/As ratio has been exploited to demonstrate the first intrinsically photo-stable chalcogenide glass at x~10, which would be suitable for fabricating photo-insensitive optical components for various applications.

©2008 Optical Society of America

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Figures (4)
Fig. 1.
Fig. 1. Three-dimensional view of the variation of transmission through GexAs45-xSe55 films as a function of wavelength (550 to 630 nm) and time after the pump laser is turned on.

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Fig. 2.
Fig. 2. Transmission spectra Ge x As 45-x Se 55 films with x=0, 10, 22, 33 before (1), and during (2, 3, 4) illumination. The spike observed at ~660 nm is the signal from the excitation laser. Inset shows variation of transmission for film samples as a function of time at the indicated wavelengths.

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Fig. 3.
Fig. 3. Time evolution of photoinduced change in absorption coefficient (Δα) of GexAs45-xSe55 glass series calculated from the changes in transmission at wavelength λ=620 nm in the absorption edge region.

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Fig. 4.
Fig. 4. Photoinduced change in the absorption coefficient of GexAs45-xSe55 glass series as a function of Ge content after irradiating for 7000 s.

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Equations (2)

Equations on this page are rendered with MathJax. Learn more.

As m − r Se n + r As ↔ h v As m Se n
GeSe u + Se v → h v GeSe u + v where u < 2 ≤ u + v
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