Thermal and structural modification in transparent and magnetic gallogermanate glasses induced by Gd2O3

Zaiter, Rayan; Dussauze, Marc; Nalin, Marcelo; Fargin, Evelyne; Adamietz, Frédéric; Toulemonde, Olivier; Cardinal, Thierry

doi:10.1016/j.jallcom.2022.165181

Cited by 10 publications

(7 citation statements)

References 35 publications

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“…Figure 4(a) shows spectra acquired for the poled zone, square center and pristine glass surfaces. The spectra were normalized in intensity at 515 cm −1 , corresponding to the Ge [4] -O-Ge [4] vibrational modes of a fully interconnected germanate network [48,49].…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The stretching modes at high frequency are almost inactive for a GeO 2 glass, but they can be observed due to the presence of non-bridging oxygen attributed to the band at 838 cm −1 for (Ge∅ 3 O) − structural units stabilized by Na + (where ∅ and O represent bridging and non-bridging oxygen respectively) [49,50]. This is also due to the presence of a mixture of glass formers for the shoulder at 780 cm −1 linked to asymmetric stretching of Ge-O-B bridges [49,51]. The intensity of the Raman band at 838 cm −1 is sensitive to the thermal poling and a decrease is observed indicating a polymerization of the germanate network in the poled layer compensating the excess of negative charge after sodium departure.…”

Section: Resultsmentioning

confidence: 99%

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Micrometric patterning of a borogermanate glass containing terbium by thermal poling to manage luminescence and second order optical properties

Orives,

Marcondes,

Karam

et al. 2024

J. Phys. Mater.

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Borogermanate glasses containing terbium ions are interesting materials due to their luminescent and magnetic properties. Terbium can present two different oxidation states and the thermal poling technique can be a pertinent way to modulate spatially the oxidation state of this ions. In this work, we demonstrate using a thermo-electrical imprinting process the transfer of micro scaled motifs on the surface of a borogermanate glass containing Tb3+ resulting in a micrometric structuring of the oxidation state of Tb3+/Tb4+ ions. A large change in absorption and luminescence optical properties is observed, arising from the distinct properties of trivalent and tetravalent terbium ions. Correlative micro luminescence, Raman and Second Harmonic Generation measurements were carried out on the patterned poled glass surface. It has demonstrated an accurate concomitant modification of the glass structure accompanying large luminescence changes and the appearance of a second order optical response which could be attributed a localized space charge implantation. These original results demonstrate how a simple electrical process allows managing multi optical properties but also pave the way to induce static electrical functionalities in a magnetic optical glassy system.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Micrometric patterning of a borogermanate glass containing terbium by thermal poling to manage luminescence and second order optical properties

Orives,

Marcondes,

Karam

et al. 2024

J. Phys. Mater.

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“…However, this indicator is somehow misleading with respect to the glass surface devitrification of the BGG compositions 15 , 16 , 25 . Avoiding alkaline ions as well as adding lanthanide oxides, i.e., Y 2 O 3 , La 2 O 3 , Yb 2 O 3 , Gd 2 O 3 , etc., in BGG glass compositions has proven to be a very effective mean to enhance the resilience to surface devitrification 13 , 15 , 16 , 26 , 27 . Nonetheless, the addition of lanthanide elements also significantly increases both glass melt viscosity and casting temperature.…”

Section: Resultsmentioning

confidence: 99%

“…Since the discovery of the barium-gallium-germanium (BGG) glasses in the 1990s 8 , considerable efforts have been deployed to further enhance the glass properties 9 – 13 , draw them into fibers 14 – 16 and also functionalize them 17 – 19 . In the meantime, gallium-rich, namely gallate, BGG glasses (GaO 3/2 /GeO 2 ratio in mol% larger than 1) have attracted significant attention, since their thermal, optical and mechanical properties are even superior to those of germanate-based BGG compositions (GaO 3/2 /GeO 2 ratio in mol% smaller than 1).…”

Section: Introductionmentioning

confidence: 99%

Toward low-loss mid-infrared Ga2O3–BaO–GeO2 optical fibers

Guerineau

Aouji

Morency

et al. 2023

Sci Rep

Self Cite

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The development of efficient and compact photonic systems in support of mid-infrared integrated optics is currently facing several challenges. To date, most mid-infrared glass-based devices are employing fluoride or chalcogenide glasses (FCGs). Although the commercialization of FCGs-based optical devices has rapidly grown during the last decade, their development is rather cumbersome due to either poor crystallization and hygroscopicity resilience or poor mechanical-thermal properties of the FCGs. To overcome these issues, the parallel development of heavy-metal oxide optical fiber from the barium-germanium-gallium oxide vitreous system (BGG) has revealed a promising alternative. However, over 30 years of fiber fabrication optimization, the final missing step of drawing BGG fibers with acceptable losses for meters-long active and passive optical devices had not yet been reached. In this article, we first identify the three most important factors that prevent the fabrication of low-loss BGG fibers i.e., surface quality, volumic striae and glass thermal-darkening. Each of the three factors is then addressed in setting up a protocol enabling the fabrication of low-loss optical fibers from gallium-rich BGG glass compositions. Accordingly, to the best of our knowledge, we report the lowest losses ever measured in a BGG glass fiber i.e., down to 200 dB km−1 at 1350 nm.

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Enhancing fluorescence properties in transparent glass ceramics via optimized Gd2O3/Ga2O3 ratios and crystallization conditions

Lin,

Li,

Jiang

et al. 2024

Ceramics International

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Thermal and structural modification in transparent and magnetic gallogermanate glasses induced by Gd2O3

Cited by 10 publications

References 35 publications

Micrometric patterning of a borogermanate glass containing terbium by thermal poling to manage luminescence and second order optical properties

Micrometric patterning of a borogermanate glass containing terbium by thermal poling to manage luminescence and second order optical properties

Toward low-loss mid-infrared Ga2O3–BaO–GeO2 optical fibers

Enhancing fluorescence properties in transparent glass ceramics via optimized Gd2O3/Ga2O3 ratios and crystallization conditions

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