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Optical properties of Ag- and AgI-doped Ge-Ga-Te far-infrared chalcogenide glasses

Abstract : Te-based glasses are ideal material for life detection and infrared-sensing applications because of their excellent far-infrared properties. In this study, the influence of Ag- and AgI- doped Te-based glasses were discussed. Thermal and optical properties of the prepared glasses were evaluated using X-ray diffraction, differential scanning calorimetry, and Fourier transform infrared spectroscopy. Results show that these glass samples have good amorphous state and thermal stability. However, Ge-Ga-Te-Ag and Ge-Ga-Te-AgI glass systems exhibit completely different in optical properties. With an increase of Ag content, the absorption cut-off edge of Ge-Ga-Te-Ag glass system has a red shift. On the contrary, a blue shift appears in Ge-Ga-Te-AgI glass system with an increase of AgI content. Moreover, the transmittance of Ge-Ga-Te-Ag glass system deteriorates while that of Ge-Ga-Te-AgI glass system ameliorates. All glass samples have wide infrared transmission windows and the far-infrared cut-off wavelengths of these glasses are beyond 25 μm. The main absorption peaks of these glasses are eliminated through a purifying method.
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Submitted on : Friday, July 8, 2016 - 11:09:37 AM
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Ci Cheng, Xunsi Wang, Tiefeng Xu, Lihong Sun, Zhanghao Pan, et al.. Optical properties of Ag- and AgI-doped Ge-Ga-Te far-infrared chalcogenide glasses. Infrared Physics and Technology, Elsevier, 2016, 76, pp.698--703. ⟨10.1016/j.infrared.2016.04.035⟩. ⟨hal-01341574⟩

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