Effect of CsI addition on the thermal properties, crystallization kinetics and short-wavelength absorption edges of GeSe2–Ga2Se3 glasses

Liu, Cunming; Tang, Gao; Li, Luo; Chen, Wei

doi:10.1016/j.jallcom.2008.06.116

Cited by 8 publications

(2 citation statements)

References 23 publications

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“…The absorption cut-off edge was located between 940 nm and 1000 nm with the increasing I content. This scenario is most likely due to the addition of I with higher electronegativity and the glass network broadens the width of the forbidden band, which results in the blue-shift of the short-wavelength, cut-off absorption edge [22].…”

Section: Analysis Of Vis-nir Absorption Edges and Optical Band Gapmentioning

confidence: 99%

Improvements on the optical properties of Ge–Sb–Se chalcogenide glasses with iodine incorporation

Jiang¹,

Wang²,

Zhu³

et al. 2015

Infrared Physics & Technology

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Decreasing glass network defects and improving optical transmittance are essential work for material researchers. We studied the function of halogen iodine (I) acting as a glass network modifier in Ge-Sb-Se-based chalcogenide glass system. A systematic series of Ge 20 Sb 5 Se 75-x I x (x = 0, 5, 10, 15, 20 at%) infrared (IR) chalcohalide glasses were investigated to decrease the weak absorption tail (WAT) and improve the mid-IR transparency. The mechanisms of the halogen I affecting the physical, thermal, and optical properties of Se-based chalcogenide glasses were reported. The structural evolutions of these glasses were also revealed by Raman spectroscopy and camera imaging. The progressive substitution of I for Se increased the optical bandgap. The WAT and scatting loss significantly decreased corresponding to the progressive decrease in structural defects caused by dangling bands and structure defects in the original Ge 20 Sb 5 Se 75 glass. The achieved maximum IR transparency of Ge-Sb-Se-I glasses can reach up to 80% with an effective transmission window between 0.94 μm to 17 μm, whereas the absorption coefficient decreased to 0.029 cm-1 at 10.16 mm. Thus, these materials are promising candidates for developing low-loss IR fibers.

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Section: Analysis Of Vis-nir Absorption Edges and Optical Band Gapmentioning

confidence: 99%

Improvements on the optical properties of Ge–Sb–Se chalcogenide glasses with iodine incorporation

Jiang¹,

Wang²,

Zhu³

et al. 2015

Infrared Physics & Technology

View full text Add to dashboard Cite

show abstract

“…Plot of ln( T) versus 1/T i also is expected to be linear, and from the slop of the plot is −nE a /R, the Avrami parameter (n) can be calculated. The relationship between the glass transition temperature T g and the heating rateˇcan be discussed through the empirical equation: (3) where A and B are constants for a given glass composition [11,12]. Plot of T g versus ln(ˇ) for the prepared samples, the values of A and B can be obtained by using the least square fit, and this equation holds good for the studied samples.…”

Section: Theoretical Considerationsmentioning

confidence: 99%