Enhanced second harmonic generation at surface in transparent nanocrystalline TeO2-based glass ceramics

Ryosuke Sakai; Yasuhiko Benino; Takayuki Komatsu

doi:10.1063/1.1313805

Enhanced second harmonic generation at surface in transparent nanocrystalline TeO₂-based glass ceramics

Ryosuke Sakai, Yasuhiko Benino, Takayuki Komatsu

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

86 Citations (Scopus)

Abstract

Transparent TeO₂-based glass ceramics consisting of nanocrystalline particles such as 15K₂O.15Nb₂O₅.70TeO₂ have been prepared, and the effect of surface layers on the second harmonic (SH) intensity has been examined using the Maker fringe method. An enhanced second harmonic generation (SHG) with fine fringe patterns has been observed at the original surface layers in transparent glass ceramics. The thickness of the surface layers giving a strong SHG is estimated to be around 50 μm, which is much larger than the coherence length of 3.5 μm for the glass ceramics. The glass ceramics without the original surface layers obtained by mechanical polishing show weak SH intensity, and any fringe pattern is not observed. Any evidence for an orientation of crystals at the surface has not been confirmed, and the origin of an enhanced SHG is unclear at this moment.

Original language	English
Pages (from-to)	2118-2120
Number of pages	3
Journal	Applied Physics Letters
Volume	77
Issue number	14
DOIs	https://doi.org/10.1063/1.1313805
Publication status	Published - Oct 2 2000
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.1313805

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abstract = "Transparent TeO2-based glass ceramics consisting of nanocrystalline particles such as 15K2O.15Nb2O5.70TeO2 have been prepared, and the effect of surface layers on the second harmonic (SH) intensity has been examined using the Maker fringe method. An enhanced second harmonic generation (SHG) with fine fringe patterns has been observed at the original surface layers in transparent glass ceramics. The thickness of the surface layers giving a strong SHG is estimated to be around 50 μm, which is much larger than the coherence length of 3.5 μm for the glass ceramics. The glass ceramics without the original surface layers obtained by mechanical polishing show weak SH intensity, and any fringe pattern is not observed. Any evidence for an orientation of crystals at the surface has not been confirmed, and the origin of an enhanced SHG is unclear at this moment.",

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