Novel NaI improved Ge–Ga–Te far-infrared chalcogenide glasses

Ci Cheng (1) , Xunsi Wang (1) , Tiefeng Xu (1) , Lihong Sun (1) , Qingde Zhu (1) , Zhanghao Pan (1) , Qiuhua Nie (1) , Peiqing Zhang (1) , Yuehao Wu (1) , Shixun Dai (1) , Xiang Shen (1) , Xianghua Zhang (2)

1 Laboratory of Infrared Material and Devices
2 ISCR - Institut des Sciences Chimiques de Rennes

In this study, a novel Te-based glass system was investigated. Some properties of Ge–Ga–Te–NaI chalcogenide glasses such as physical, thermal and optical transmitting were discussed. XRD patterns show this glass system with best amorphous state can dissolve content of NaI as much as 35 at.%. The lowest cut-off wavelength of glass samples is 1645 nm which is the smallest wavelength among the reported Te-based glasses doping with halide. DSC curves indicate that all glass samples have good thermal stabilities (ΔT > 100 °C) and the highest ΔT value corresponding to (Ge15Ga10Te75)85(NaI)15 glass is 120 °C which is 8 °C greater than that of Ge–Ga–Te host glass. The infrared spectra manifest Ge–Ga–Te–NaI chalcogenide glass system has a wide infrared transmission window between 1.6 μm and 20 μm. Consequently, Ge–Ga–Te–NaI glasses can be a candidate material for far infrared optic imaging and bio-sensing applications

Mots clés: Chalcohalide glass; Infrared spectra; Thermal stability

Domaines: Chimie; Matériaux

Ci Cheng, Xunsi Wang, Tiefeng Xu, Lihong Sun, Qingde Zhu, et al.. Novel NaI improved Ge–Ga–Te far-infrared chalcogenide glasses. Infrared Physics and Technology, 2015, 72, pp.148-152. ⟨10.1016/j.infrared.2015.07.024⟩. ⟨hal-01188223⟩