Composition dependence of physical and optical properties in Ge-As-S chalcogenide glasses

Yan Yang; Zhiyong Yang; Pierre Lucas; Yuwei Wang; Zhijie Yang; Anping Yang; Bin Zhang; Haizheng Tao

doi:10.1016/j.jnoncrysol.2016.03.003

Composition dependence of physical and optical properties in Ge-As-S chalcogenide glasses

Yan Yang, Zhiyong Yang, Pierre Lucas, Yuwei Wang, Zhijie Yang, Anping Yang, Bin Zhang, Haizheng Tao

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

Abstract

The composition dependence of density (d), refractive index (n) and optical bandgap (E_g) 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 E_g of Ge-As-S glasses with good accuracy. It is shown that the value of E_g 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.

Original language	English (US)
Pages (from-to)	38-42
Number of pages	5
Journal	Journal of Non-Crystalline Solids
Volume	440
DOIs	https://doi.org/10.1016/j.jnoncrysol.2016.03.003
State	Published - May 15 2016

Keywords

Chalcogenide glasses
Diffuse reflectance spectrum
Optical bandgap
Refractive index

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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10.1016/j.jnoncrysol.2016.03.003

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title = "Composition dependence of physical and optical properties in Ge-As-S chalcogenide glasses",

abstract = "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.",

keywords = "Chalcogenide glasses, Diffuse reflectance spectrum, Optical bandgap, Refractive index",

author = "Yan Yang and Zhiyong Yang and Pierre Lucas and Yuwei Wang and Zhijie Yang and Anping Yang and Bin Zhang and Haizheng Tao",

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doi = "10.1016/j.jnoncrysol.2016.03.003",

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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

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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JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

ER -

Composition dependence of physical and optical properties in Ge-As-S chalcogenide glasses

Abstract

Keywords

ASJC Scopus subject areas

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