In this work, glass forming region of arsenic- and germanium-free chalcogenide glasses (ChGs) within a gallium-tin-selenium (Ga-Sn-Se, GSS) ternary system is depicted. Seven representative compositions in the glass forming region are selected, and the corresponding bulk GSS glass samples are prepared for characterizing the optical properties. The experimental results show that the GSS ChGs have a wide transparent window from ~1 to 20 μm and low dispersion at both 3-5 μm and 8-12 μm mid-infrared windows. The dependence of optical bandgap energy (E_opg) on mean coordination number (MCN) indicates the existence of medium-range interactions in the GSS glass network, and its origin is investigated by the Raman spectra.

在这项工作中，描绘了镓锡硒（Ga-Sn-Se，GSS）三元体系中无砷和无锗的硫族化物玻璃（ChGs）的玻璃形成区域。选择玻璃形成区域中的七个代表性成分，并准备相应的块状GSS玻璃样品以表征光学性能。实验结果表明，GSS ChGs具有从〜1至20μm的宽透明窗口，并且在3-5μm和8-12μm的中红外窗口均具有较低的色散。光学带隙能量（E _opg）对平均配位数（MCN）的依赖性表明GSS玻璃网络中存在中程相互作用，并通过拉曼光谱研究了其起源。