硫系玻璃的折射率和热光系数调控

发布时间：2018-04-18 17:18

本文选题：硫系玻璃 + 折射率　；参考：《江苏师范大学》2017年硕士论文

【摘要】：硫系玻璃是基于硫族元素S、Se、Te的非晶态材料,它们具有优异的红外透光性、高的线性和非线性折射率、低的声子能量、可调谐的光敏性,在红外光学、非线性光子学、红外激光等领域备受关注。玻璃的折射率(n)和热光系数(ζ)是光学设计中十分重要的两个参数,然而由于测试技术和测试精度的限制,针对硫系玻璃折射率和热光系数的系统研究极少。本文选取适宜商业化的Ge-As-Se和Ge-Sb-Se硫系玻璃作为研究对象,制备了具有不同拓扑网络结构(以平均配位数MCN或r表征)和化学配比(以组成偏离化学计量配比的程度dSe表征)的玻璃样品,利用Raman光谱技术研究了玻璃的微观结构,重点考察了玻璃的n、ζ、密度(d)、体积膨胀系数(β)等性能参数与r和dSe的内在联系,获得了如下主要结果:(1)Ge-As-(Sb)Se玻璃具有以[GeSe4]四面体和[AsSe3]([SbSe3])三角锥结构单元为骨架相互交联形成的网络结构。在化学计量比的玻璃中未见同极键出现;当Se过量时,结构中形成Se链和Se环;当Se不足时,结构中出现As-As(SbSb)和Ge-Ge同极键。(2)在Ge-As(Sb)-Se玻璃中,n随d的增加而增大,ζ随体β的增大而近似线性减小。在Ge-As-Se玻璃中,β随r的增大而减小;当Ge含量固定时,d在化学计量配比时(dSe=0)具有最大值;当As含量固定时,d在
[Abstract]:The sulfur glasses are amorphous materials based on the sulfur group element Scae Seante. They have excellent infrared transmittance, high linear and nonlinear refractive index, low phonon energy, tunable Guang Min, in infrared optics, nonlinear photonics.Infrared laser and other fields have attracted much attention.The refractive index (n) and thermo-optical coefficient (味) of glass are two very important parameters in optical design. However, due to the limitation of measurement technology and precision, the systematic study on refractive index and thermo-optical coefficient of sulfur glass is rare.In this paper, the suitable commercial Ge-As-Se and Ge-Sb-Se sulfur glasses are selected as the research object.Glass samples with different topological network structure (characterized by average coordination number MCN or r) and chemical ratio (characterized by degree of deviation from stoichiometric ratio dSe) were prepared. The microstructure of the glass was studied by Raman spectroscopy.The relationship between the properties of glass, such as n, 味, density, volume expansion coefficient (尾) and r and dSe, is mainly investigated. The main results are as follows. The main results are as follows: Ge-As-SbSe glass has a network structure which is cross-linked by [GeSe4] tetrahedron and [AsSe3] ([SbSe3]) triangular-cone structure unit.In stoichiometric glass, the same polar bond is not found; when se is excessive, the se chain and se ring are formed in the structure; when se is insufficient,As-As-SbSb) and Ge-Ge homopolar bond. 2) increase with the increase of d in Ge-As(Sb)-Se glass, and decrease linearly with increase of 尾 in Ge-As(Sb)-Se glass.In Ge-As-Se glass, 尾 decreases with the increase of r; when GE content is fixed in stoichiometric ratio, it has the maximum value;
【学位授予单位】：江苏师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ171.1

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