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Open AccessArticle

Ultrafast Laser-Induced Crystallization of Lead Germanate Glass

Mendeleev University of Chemical Technology, Miusskaya Sq. 9, Moscow 125047, Russia
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Academic Editor: Bertrand Poumellec
Crystals 2021, 11(2), 193; https://doi.org/10.3390/cryst11020193
Received: 16 January 2021 / Revised: 4 February 2021 / Accepted: 9 February 2021 / Published: 18 February 2021
(This article belongs to the Special Issue Laser-Induced Crystallization)
Laser-induced space-selective crystallization of glass enabling the growth of continuous crystal-in-glass architectures consisting of non-centrosymmetric phases with functional properties is promising, including single-crystal waveguides for the development of integrated optical circuits. In this study, femtosecond laser direct writing of crystalline lines inside lead germanate glass with the composition close to Pb5Ge3O11 has been demonstrated. The growth of crystalline lines by the .moving focused laser beam required the preliminary growth of a seed crystal by the fixed beam. Confocal Raman spectroscopy revealed the precipitation of ferroelectric Pb5Ge3O11, which, under certain exposure conditions, could be accompanied by precipitation of the metastable lead germanate phase. Depending on the laser beam parameters, either bilateral growth providing split, horseshoe-shaped morphology of the crystal cross-section, or centered growth resulting in elongated, elliptical cross-section shape occurred. The obtained results are of interest for the fabrication of ferroelectric Pb5Ge3O11-based crystal-in-glass waveguides. View Full-Text
Keywords: space-selective crystallization; lead germanate glass; femtosecond laser; direct laser writing; Pb5Ge3O11 space-selective crystallization; lead germanate glass; femtosecond laser; direct laser writing; Pb5Ge3O11
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MDPI and ACS Style

Lotarev, S.V.; Lipatiev, A.S.; Lipateva, T.O.; Lopatina, E.V.; Sigaev, V.N. Ultrafast Laser-Induced Crystallization of Lead Germanate Glass. Crystals 2021, 11, 193. https://doi.org/10.3390/cryst11020193

AMA Style

Lotarev SV, Lipatiev AS, Lipateva TO, Lopatina EV, Sigaev VN. Ultrafast Laser-Induced Crystallization of Lead Germanate Glass. Crystals. 2021; 11(2):193. https://doi.org/10.3390/cryst11020193

Chicago/Turabian Style

Lotarev, Sergey V.; Lipatiev, Alexey S.; Lipateva, Tatiana O.; Lopatina, Elena V.; Sigaev, Vladimir N. 2021. "Ultrafast Laser-Induced Crystallization of Lead Germanate Glass" Crystals 11, no. 2: 193. https://doi.org/10.3390/cryst11020193

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