Investigation of the structural environment and chemical bonding of fluorine in Yb-doped fluorosilicate glass optical fibres

Cavillon, Maxime; Faugas, Benoît; Zhao, Junjie; Kucera, Courtney; Kukuoz, B.; Dragic, Peter D.; Qiao, Xvsheng; Du, Jincheng; Ballato, John

doi:10.1016/j.jct.2018.08.016

Cited by 11 publications

(3 citation statements)

References 33 publications

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“…1 The fluoride nanocrystals have lower phonon energy 2 and higher solubility for lanthanide ions 3 while the oxide matrix can stabilize the fluoride nanocrystals and provide excellent mechanical properties and chemical durability. 4 These advantages make oxyfluoride glass ceramics excellent candidates for photonic applications such as spectral converters, 5 solid-state lightings, 6,7 laser hosts, 8,9 fibers, 10 and optical temperature sensors. 11,12 Among various fluoride nanocrystals, rare-earth fluorides, RF 3 (R = Y 3+ , La 3+ , Gd 3+ , Yb 3+ , etc.…”

Section: Introductionmentioning

confidence: 99%

Structural Origins of RF₃/NaRF₄ Nanocrystal Precipitation from Phase-Separated SiO₂–Al₂O₃–RF₃–NaF Glasses: A Molecular Dynamics Simulation Study

Zhao

et al. 2019

J. Phys. Chem. B

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Oxyfluoride glass-ceramics with RF3 or NaRF4 (R3+: rare earth elements) nanocrystals are considered as favorable hosts for luminescence applications. In this work, we utilized large-scale molecular dynamics (MD) simulations with effective partial charge potentials to study a series of oxyfluoride glasses that are of interest to the precipitation of RF3 or NaRF4 nanocrystals as previous experiment results suggested. The results show that phase separation exists in all glass compositions with fluoride-rich regions made up of R3+, Na+, and F– and oxide-rich regions consisting of aluminosilicate networks. These fluoride-enriched regions can serve as the precursor for RF3, cubic and hexagonal NaRF4, and NaF crystal precipitation. The results also confirm that the concentration of Na+ in the fluoride phase plays a key role in determining the crystal phases (RF3, NaRF4, or NaF) and crystal structure (cubic vs hexagonal NaRF4) to be precipitated. Consequently, this study shows that MD simulations with effective potentials can fill the gap in the structural understanding of oxyfluoride glass and provide insights into atomic scale information of the phase separation behavior that is useful in predicting the potential crystal types in oxyfluoride glass. When coupled with experimental validations, these simulations can expedite the exploration of novel luminescent oxyfluoride glass ceramics.

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Section: Introductionmentioning

confidence: 99%

Structural Origins of RF₃/NaRF₄ Nanocrystal Precipitation from Phase-Separated SiO₂–Al₂O₃–RF₃–NaF Glasses: A Molecular Dynamics Simulation Study

Zhao

et al. 2019

J. Phys. Chem. B

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“…Numerical tools are also under development to simulate the formation of the nanoparticles. For instance, molecular dynamics allow simulating the formation of phase-separated nanoparticles in oxide [68], aluminosilicate [69], and oxyfluoride [70] glass optical fibers. Reviews on the preparation methods and properties of transparent glass-ceramics can be found in [71,72].…”

Section: Preparation Of Particle-containing Glassesmentioning

confidence: 99%

Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses

Veber

Vermillac

et al. 2019

Fibers

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For years, scientists have been looking for different techniques to make glasses perfect: fully amorphous and ideally homogeneous. Meanwhile, recent advances in the development of particle-containing glasses (PCG), defined in this paper as glass-ceramics, glasses doped with metallic nanoparticles, and phase-separated glasses show that these "imperfect" glasses can result in better optical materials if particles of desired chemistry, size, and shape are present in the glass. It has been shown that PCGs can be used for the fabrication of nanostructured fibers-a novel class of media for fiber optics. These unique optical fibers are able to outperform their traditional glass counterparts in terms of available emission spectral range, quantum efficiency, non-linear properties, fabricated sensors sensitivity, and other parameters. Being rather special, nanostructured fibers require new, unconventional solutions on the materials used, fabrication, and characterization techniques, limiting the use of these novel materials. This work overviews practical aspects and progress in the fabrication and characterization methods of the particle-containing glasses with particular attention to nanostructured fibers made of these materials. A review of the recent achievements shows that current technologies allow producing high-optical quality PCG-fibers of different types, and the unique optical properties of these nanostructured fibers make them prospective for applications in lasers, optical communications, medicine, lighting, and other areas of science and industry.Made of glass, optical fibers inherited all positive and negative properties of this material. Glasses are easy and inexpensive to produce on any scale and in any shape, they can possess high chemical stability and mechanical strength, and have high transparency. However, they could hardly compete, for example, with crystalline materials in thermal conductivity, or rare-earth elements' absorption, emission cross-sections, and available transparency range. Recent advances in glass science showed that properties of this material can be significantly improved if some additional phases are formed or impregnated in the glass. In particular, advances have been achieved in the development of particle-containing glasses: glass-ceramic materials, glasses doped with metallic nanoparticles, and phase-separated glasses. To date, these particle-containing glasses have become quite common and actively used in case of the bulk materials, but are still rather new for fiber optics.The purpose of this review is to summarize recent advances in the fabrication of structured fibers made of particle-containing glasses, their potential benefits, their actual properties, and their potential applications. The review covers three types of particle-containing glasses (PCG): crystalline dielectric particles, i.e., glass-ceramics; metallic nanoparticles (MeNPs); and dielectric amorphous particles, i.e., phase-separated glasses.First, we consider properties of the PCG bulk materials, their potenti...

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“…In oxyfluoride glass, fluoride phase separation can be observed over certain composition ranges [15,16] with electron microscopes, [17] small-angle scattering technique, [18] or thermoanalytical techniques. [19,20] Our previous results suggested that www.advancedsciencenews.com www.advtheorysimul.com the fluoride phase separation is a result of the immiscibility nature between the oxide and fluoride network.…”

Section: Introductionmentioning

confidence: 99%

Structural Origins of BaF₂/Ba_{1 −}_xR_xF_{2 +}_x/RF₃ Nanocrystals Formation from Phase Separated Fluoroaluminosilicate Glass: A Molecular Dynamic Simulation Study

Zhao

Ren

et al. 2019

Advcd Theory and Sims

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Fluoroaluminosilicate glass-ceramics with M 1 − x R x F 2 + x (M 2+ : Sr 2+ , Ba 2+ , R 3+ : rare earth ions) crystals are novel host materials for luminescence applications. However, the preparation of such materials is still a trial-error based approach due to the lack of detailed glass structure understanding. In this work, the authors study the phase separation and potential nanocrystal formation in a series of Ba 2+ and La 3+ containing fluoroaluminosilicate glasses by molecular dynamics (MD) simulations. Fluoride phase separation is observed from all simulated glass samples. With gradual LaF 3 to BaF 2 substitution, the cations enrichment changes from Ba 2+ , to Ba 2+ and La 3+ , and finally La 3+ in the fluoride-rich regions. Besides, the competition between Al 3+ and La 3+ in fluoride phase and the consequently redistribution of Al 3+ and Na + into oxide phase are observed, which can change the local environment of luminescent centers, affecting luminescence. An experimental support to this phenomenon is given. Therefore, MD simulation with effective potentials can be a practical method to study the structural origins of nanocrystal from fluoride phase separation as well as to study the structure-property relationship in fluoroaluminosilicate glass. The simulation driven glass structure and crystal phase exploration can thus become an effective method in designing glass-ceramics for luminescence and other applications.

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Investigation of the structural environment and chemical bonding of fluorine in Yb-doped fluorosilicate glass optical fibres

Cited by 11 publications

References 33 publications

Structural Origins of RF₃/NaRF₄ Nanocrystal Precipitation from Phase-Separated SiO₂–Al₂O₃–RF₃–NaF Glasses: A Molecular Dynamics Simulation Study

Structural Origins of RF₃/NaRF₄ Nanocrystal Precipitation from Phase-Separated SiO₂–Al₂O₃–RF₃–NaF Glasses: A Molecular Dynamics Simulation Study

Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses

Structural Origins of BaF₂/Ba_{1 −}_xR_xF_{2 +}_x/RF₃ Nanocrystals Formation from Phase Separated Fluoroaluminosilicate Glass: A Molecular Dynamic Simulation Study

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Investigation of the structural environment and chemical bonding of fluorine in Yb-doped fluorosilicate glass optical fibres

Cited by 11 publications

References 33 publications

Structural Origins of RF3/NaRF4 Nanocrystal Precipitation from Phase-Separated SiO2–Al2O3–RF3–NaF Glasses: A Molecular Dynamics Simulation Study

Structural Origins of RF3/NaRF4 Nanocrystal Precipitation from Phase-Separated SiO2–Al2O3–RF3–NaF Glasses: A Molecular Dynamics Simulation Study

Nano-Structured Optical Fibers Made of Glass-Ceramics, and Phase Separated and Metallic Particle-Containing Glasses

Structural Origins of BaF2/Ba1 −xRxF2 +x/RF3 Nanocrystals Formation from Phase Separated Fluoroaluminosilicate Glass: A Molecular Dynamic Simulation Study

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Structural Origins of RF₃/NaRF₄ Nanocrystal Precipitation from Phase-Separated SiO₂–Al₂O₃–RF₃–NaF Glasses: A Molecular Dynamics Simulation Study

Structural Origins of RF₃/NaRF₄ Nanocrystal Precipitation from Phase-Separated SiO₂–Al₂O₃–RF₃–NaF Glasses: A Molecular Dynamics Simulation Study

Structural Origins of BaF₂/Ba_{1 −}_xR_xF_{2 +}_x/RF₃ Nanocrystals Formation from Phase Separated Fluoroaluminosilicate Glass: A Molecular Dynamic Simulation Study