Abstract
A unique effect of Bi on the optical and electrical properties of mixed Ga-containing Ge-Se and Ge-Te glasses is discovered. It is shown that glass with a low Bi content is completely transparent in a 3–16 μm spectral range, while the glass with a slightly higher Bi content possesses a large () attenuation coefficient, making a thick glass sample fully opaque to VIS-IR radiation. Despite this contrast, both types of glass are found to retain their semiconducting properties, the DC conductivity at room temperature, , being comparable to that of silicon.
© 2018 Optical Society of America
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