Second harmonic generation in transparent surface crystallized glasses with stillwellite-type LaBGeO5

Y. Takahashi; Y. Benino; T. Fujiwara; T. Komatsu

doi:10.1063/1.1360699

Second harmonic generation in transparent surface crystallized glasses with stillwellite-type LaBGeO₅

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

Research output: Contribution to journal › Article › peer-review

112 Citations (Scopus)

Abstract

Transparent optical nonlinear crystallized glasses with the composition of 25La₂O₃ 25B₂O₃ 50GeO₂, stoichiometric to ferroelectric stillwellite-type LaBGeO₅ crystalline phase, have been prepared by a two-step heat-treatment (first heat treatment: T¹ = 670°C, t₁ = 10h, second heat-treatment: T₂, t₂), and their second harmonic (SH) intensities have been examined using the Maker fringe method. The samples obtained by heat treatments at T₂ = 720∼725°C for t₂ = 3 h show only surface crystallization and exhibit clear and fine (narrow) fringe patterns. The samples heat treated at T₂ = 740 and 750°C exhibit relatively strong SH intensities, but the fringe patterns in such samples are broad. It is proposed that SH waves generated from surface LaBGeO₅ crystalline layers scatter at LaBGeO₅ crystals formed in the interior of glass, causing the disappearance of fine fringe patterns.

Original language	English
Pages (from-to)	5282-5287
Number of pages	6
Journal	Journal of Applied Physics
Volume	89
Issue number	10
DOIs	https://doi.org/10.1063/1.1360699
Publication status	Published - 2001 May 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Second harmonic generation in transparent surface crystallized glasses with stillwellite-type LaBGeO5",

abstract = "Transparent optical nonlinear crystallized glasses with the composition of 25La2O3 25B2O3 50GeO2, stoichiometric to ferroelectric stillwellite-type LaBGeO5 crystalline phase, have been prepared by a two-step heat-treatment (first heat treatment: T1 = 670°C, t1 = 10h, second heat-treatment: T2, t2), and their second harmonic (SH) intensities have been examined using the Maker fringe method. The samples obtained by heat treatments at T2 = 720∼725°C for t2 = 3 h show only surface crystallization and exhibit clear and fine (narrow) fringe patterns. The samples heat treated at T2 = 740 and 750°C exhibit relatively strong SH intensities, but the fringe patterns in such samples are broad. It is proposed that SH waves generated from surface LaBGeO5 crystalline layers scatter at LaBGeO5 crystals formed in the interior of glass, causing the disappearance of fine fringe patterns.",

author = "Y. Takahashi and Y. Benino and T. Fujiwara and T. Komatsu",

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AU - Takahashi, Y.

AU - Benino, Y.

AU - Fujiwara, T.

AU - Komatsu, T.

PY - 2001/5/15

Y1 - 2001/5/15

N2 - Transparent optical nonlinear crystallized glasses with the composition of 25La2O3 25B2O3 50GeO2, stoichiometric to ferroelectric stillwellite-type LaBGeO5 crystalline phase, have been prepared by a two-step heat-treatment (first heat treatment: T1 = 670°C, t1 = 10h, second heat-treatment: T2, t2), and their second harmonic (SH) intensities have been examined using the Maker fringe method. The samples obtained by heat treatments at T2 = 720∼725°C for t2 = 3 h show only surface crystallization and exhibit clear and fine (narrow) fringe patterns. The samples heat treated at T2 = 740 and 750°C exhibit relatively strong SH intensities, but the fringe patterns in such samples are broad. It is proposed that SH waves generated from surface LaBGeO5 crystalline layers scatter at LaBGeO5 crystals formed in the interior of glass, causing the disappearance of fine fringe patterns.

AB - Transparent optical nonlinear crystallized glasses with the composition of 25La2O3 25B2O3 50GeO2, stoichiometric to ferroelectric stillwellite-type LaBGeO5 crystalline phase, have been prepared by a two-step heat-treatment (first heat treatment: T1 = 670°C, t1 = 10h, second heat-treatment: T2, t2), and their second harmonic (SH) intensities have been examined using the Maker fringe method. The samples obtained by heat treatments at T2 = 720∼725°C for t2 = 3 h show only surface crystallization and exhibit clear and fine (narrow) fringe patterns. The samples heat treated at T2 = 740 and 750°C exhibit relatively strong SH intensities, but the fringe patterns in such samples are broad. It is proposed that SH waves generated from surface LaBGeO5 crystalline layers scatter at LaBGeO5 crystals formed in the interior of glass, causing the disappearance of fine fringe patterns.

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Second harmonic generation in transparent surface crystallized glasses with stillwellite-type LaBGeO₅

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