Structural analysis and chemical stability of Ge and As telluride glasses by Raman spectroscopy

被引:2
作者
Bayko, Dmitriy P. [1 ]
Lucas, Pierre [1 ]
机构
[1] Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85712 USA
来源
JOURNAL OF NON-CRYSTALLINE SOLIDS-X | 2023年 / 18卷
关键词
Chalcogenide glass; Raman spectroscopy; Short-range order; SHORT-RANGE ORDER; AS-TE GLASSES; PHASE-CHANGE; LOCAL-STRUCTURE; CHALCOGENIDE GLASSES; OPTICAL-PROPERTIES; ATOMIC-STRUCTURE; SCATTERING; SE; MU;
D O I
10.1016/j.nocx.2023.100186
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Telluride glasses such as Ge-As-Te, Ge-Te, and As-Te are of much interest due to their extensive infrared transparency. The structure of these glasses has also been broadly investigated, but Raman studies are rare and current literature data shows a significant level of disagreements and discrepancies. Here we show that the source of this disparity is two-fold, first the low damage threshold of these glasses requires low photon energy and low power to obtain reliable spectra, and second the unusual surface oxidation of telluride glasses leads to strong Raman artefact in relatively short time. Overall, high resolution spectra of freshly polished glasses obtained at low power with a near infrared source reveal that only four main modes are required to consistently interpret all Raman spectral features. Analysis of these Raman spectra confirm the presence of large chemical disorder in Ge-As-Te and As-Te glasses, consistent with previously reported spectroscopic studies.
引用
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页数:8
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