Influence of the Ga addition on optical properties of Pr in Ge–Sb–Se glasses

Kim, Jung Kyun; Jin, Byeong Kyou; Chung, Woon Jin; Park, Bong Je; Heo, Jong; Choi, Yong Gyu

doi:10.1016/j.jpcs.2011.08.025

Cited by 10 publications

(8 citation statements)

References 14 publications

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“…Although others have shown that addition of gallium to sulfide chalcogenide glasses helps to solubilize the rare‐earth ions, our previous work indicated that decreasing Ga content in Dy 3+ (DyCl 3 )‐doped Ge–As–Ga–Se glasses can give benefit in reducing crystallization and scattering in bulk glasses. This work will present a detailed study of the effect of Ga content on crystallization of selenide‐based chalcogenide glasses, both in the bulk glass and at the glass surface.…”

Section: Introductionmentioning

confidence: 84%

First Identification of Rare‐Earth Oxide Nucleation in Chalcogenide Glasses and Implications for Fabrication of Mid‐Infrared Active Fibers

et al. 2013

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Gallium (Ga) helps solubilize rare-earth ions in chalcogenide glasses, but has been found to form the dominant crystallizing selenide phase in bulk glass in our previous work. Here, the crystallization behavior is compared of as-annealed 0-3000 ppmw Dy 3+ -doped Ge-As-Ga-Se glasses with different Ga levels: Ge 16.5 As (19 -x) Ga x Se 64.5 (at.%), for x = 3 and 10, named Ga 3 and Ga 10 glass series, respectively. X-ray diffraction and high-resolution transmission electron microscopy are employed to examine crystals in the bulk of the as-prepared glasses, and the crystalline phase is proved to be the same: Ge-modified, face centered cubic a-Ga 2 Se 3 . Light scattering of polished glass samples is monitored using Fourier transform spectroscopy. When Ga is decreased from 10 to 3 at.%, the bulk crystallization is dramatically reduced and the optical scattering loss decreases. Surface defects, with a rough topology observed for both series of as-prepared chalcogenide glasses, are demonstrated to comprise Dy, Si, and [O]. For the first time, evidence for the proposed nucleation agent Dy 2 O 3 is found inside the bulk of as-prepared glass. This is an important result because rare-earth ions bound in a high phonon-energy oxide local environment are, as a consequence, inactive mid-infrared fluorophores because they undergo preferential nonradiative decay of excited states.

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Section: Introductionmentioning

confidence: 84%

First Identification of Rare‐Earth Oxide Nucleation in Chalcogenide Glasses and Implications for Fabrication of Mid‐Infrared Active Fibers

et al. 2013

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“…than 99.9999% in purity. Synthesis of glass specimen was carried out following the conventional processing technique for chalcogenide glass [17][18][19]. Each silica ampoule containing desired amount of starting materials was kept inside a rocking furnace for 12 h at 1200°C and then water-quenched.…”

Section: Methodsmentioning

confidence: 99%

Thermal properties of ternary Ge–Sb–Se chalcogenide glass for use in molded lens applications

Lee

Park

et al. 2016

Journal of Non-Crystalline Solids

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“…Starting materials of elemental Ge, Sb (Advanced Materials) and Se (Alfa Aesar) were all better than 99.999% in purity. Synthesis of glass specimen was carried out following the conventional processing technique for chalcogenide glass [8][9][10]. Each silica ampoule containing desired composition was kept for 12 hours at 1200…”

Section: Methodsmentioning

confidence: 99%

Compositional Dependence Of Hardness Of Ge-Sb-Se Glass For Molded Lens Applications

Park¹,

Lee²,

Shin³

et al. 2015

Archives of Metallurgy and Materials

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Chalcogenide glass in the ternary Ge-Sb-Se system is inherently moldable, thus being considered as a strong candidate material for use in infrared-transmitting lens applications from the viewpoint of thermal and mechanical stability. In an effort to experimentally determine compositional region suitable for the molded lens applications, we evaluate its compositional dependence of hardness. Among the constituent atoms, Ge content turns out to exert a most conspicuous correlation with hardness. This phenomenological behavior is then explained in connection with the structural evolution that Ge brings about.

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Influence of the Ga addition on optical properties of Pr in Ge–Sb–Se glasses

Cited by 10 publications

References 14 publications

First Identification of Rare‐Earth Oxide Nucleation in Chalcogenide Glasses and Implications for Fabrication of Mid‐Infrared Active Fibers

First Identification of Rare‐Earth Oxide Nucleation in Chalcogenide Glasses and Implications for Fabrication of Mid‐Infrared Active Fibers

Thermal properties of ternary Ge–Sb–Se chalcogenide glass for use in molded lens applications

Compositional Dependence Of Hardness Of Ge-Sb-Se Glass For Molded Lens Applications

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