Formation mechanism of ferroelastic Ba2TiGe2O8 and second order optical non-linearity in transparent crystallized glasses

Y. Takahashi, Yasuhiko Benino, T. Fujiwara, T. Komatsu

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Abstract

The formation mechanism of ferroelastic Ba2TiGe2O8 crystals in 30BaO·15TiO2·55GeO2 glass and second order optical non-linearity of transparent crystallized glasses have been examined. It has been confirmed that the BaTiGe3O9 crystalline phase is initially precipitated and acts as a nucleation site for the formation of the Ba2TiGe2O8 crystalline phase. Transparent surface crystallized glasses consisting of grain-oriented Ba2TiGe2O8 crystals have been successfully fabricated by means of heat-treatments (690-750 °C, 3 h) for the first time, and second harmonic (SH) generation has been clearly observed, demonstrating that Ba2TiGe2O8 is a non-linear optical crystalline phase. The SH intensity of transparent crystallized glasses (bulk state) with crystalline layers of ∼10 μm thickness is comparable to that of Z-cut α-quartz single crystal with a thickness of 0.6 mm. The SH intensity of Ba2TiGe2O8 crystals (powdered state) prepared through solid-state reaction is about 130 times as large as that of pulverized α-quartz.

Original languageEnglish
Pages (from-to)320-330
Number of pages11
JournalJournal of Non-Crystalline Solids
Volume316
Issue number2-3
DOIs
Publication statusPublished - Feb 2003
Externally publishedYes

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nonlinearity
Crystalline materials
Glass
Quartz
glass
Crystals
crystals
harmonics
Harmonic generation
quartz crystals
Solid state reactions
harmonic generations
Nucleation
heat treatment
quartz
Heat treatment
Single crystals
nucleation
solid state
single crystals

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Formation mechanism of ferroelastic Ba2TiGe2O8 and second order optical non-linearity in transparent crystallized glasses. / Takahashi, Y.; Benino, Yasuhiko; Fujiwara, T.; Komatsu, T.

In: Journal of Non-Crystalline Solids, Vol. 316, No. 2-3, 02.2003, p. 320-330.

Research output: Contribution to journalArticle

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