TY - JOUR
T1 - Composition dependence of physical and optical properties in Ge-As-S chalcogenide glasses
AU - Yang, Yan
AU - Yang, Zhiyong
AU - Lucas, Pierre
AU - Wang, Yuwei
AU - Yang, Zhijie
AU - Yang, Anping
AU - Zhang, Bin
AU - Tao, Haizheng
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China ( 61205207 , 61575086 , 61405080 , 51303072 ), the Priority Academic Program Development of Jiangsu Higher Education Institutions , and Jiangsu Collaborative Innovation Centre of Advanced Laser Technology and Emerging Industry . This work was also supported by NSF-ECCS under grant #1201865 .
Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/5/15
Y1 - 2016/5/15
N2 - The composition dependence of density (d), refractive index (n) and optical bandgap (Eg) of Ge-As-S chalcogenide glasses is investigated. It is shown that d correlates linearly with sulfur content but relatively poorly with the mean coordination number (MCN). It is also shown that n does not correlate directly with d, and instead a semi-empirical relation based on the molar refractivity (R) of Ge, As and S is derived, permitting to predict n from d with < 1% error. A convenient method based on diffuse reflectance is proposed to measure Eg of Ge-As-S glasses with good accuracy. It is shown that the value of Eg is dominated by the S content. These findings make it convenient to tailor the physical and optical properties of glasses in Ge-As-S system.
AB - The composition dependence of density (d), refractive index (n) and optical bandgap (Eg) of Ge-As-S chalcogenide glasses is investigated. It is shown that d correlates linearly with sulfur content but relatively poorly with the mean coordination number (MCN). It is also shown that n does not correlate directly with d, and instead a semi-empirical relation based on the molar refractivity (R) of Ge, As and S is derived, permitting to predict n from d with < 1% error. A convenient method based on diffuse reflectance is proposed to measure Eg of Ge-As-S glasses with good accuracy. It is shown that the value of Eg is dominated by the S content. These findings make it convenient to tailor the physical and optical properties of glasses in Ge-As-S system.
KW - Chalcogenide glasses
KW - Diffuse reflectance spectrum
KW - Optical bandgap
KW - Refractive index
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U2 - 10.1016/j.jnoncrysol.2016.03.003
DO - 10.1016/j.jnoncrysol.2016.03.003
M3 - Article
AN - SCOPUS:84960455418
SN - 0022-3093
VL - 440
SP - 38
EP - 42
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
ER -