The effect of the structure on the physical properties in Ge x As 10 Se 90-x glasses

Chalcogenide Letters

article

S. W. Xu¹  T. W. Liang¹  X, Y, Zhu¹ 

[1] College of Mathematics and Physics, Hunan University of Arts and Science

关键词: Chalcogenide glasses;    Raman spectra;    Refractive index;    Optical bandgap;    Homopolar bond;   

DOI  :  10.15251/CL.2023.201.55

学科分类：物理（综合）

来源: Forum of Chalcogeniders

【 摘 要 】

We have prepared a group of GexAs10Se90-x glass(x=5, 10, 15, 20, 25, 30, and 35 at. %) and investigated their structure and physical properties. It was found that, the minimum refractive index and maximum optical bandgap occur in Ge25As10Se65 glass that is chemically stoichiometric. Analysis of Raman spectra of the glasses indicated that the number of the Ge-Ge, As-As, and Se-Se homopolar bonds is closely related to the bandgap, because the band-tails formed by homopolar bonds could reduce the optical bandgap. The transition behavior of the structural units and physical properties of the glasses occurs at the glass with the chemically stoichiometric composition, and thus the chemical composition dominates physical properties of GexAs10Se90-x chalcogenide glasses.

【 授权许可】

Free