Silica-based glasses as photonic materials-second-order nonlinearity induced by UV-poling

A. J. Ikushima; T. Fujiwara

doi:10.1080/10587250008025684

Silica-based glasses as photonic materials-second-order nonlinearity induced by UV-poling

A. J. Ikushima, T. Fujiwara

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

After simultaneous applications of ultraviolet irradiation and a sufficiently high electric field, the so-called UV-poling, silica glass doped with germanium shows quite a large second-order optical nonlinearities in both bulk and film samples, and thus induced d coefficient is comparable to those of LiNbO₃ crystal. The induced effect decays after the UV-poling with exactly a single exponential function of time, suggesting a kind of ordered structure formed in the glass by the UV-poling. The decay rate strongly indicates Ge-E′ centers to be relevant agents to the nonlinearity. The decay or degradation can be made much slower with addition of impurities as electron scavengers. Mechanism to give the nonlinearity will be discussed, relating to generation of crystallites in the glass.

Original language	English
Pages (from-to)	499-511
Number of pages	13
Journal	Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals
Volume	353
DOIs	https://doi.org/10.1080/10587250008025684
Publication status	Published - 2000 Jan 1
Externally published	Yes
Event	5th International Conference on Frontiers of Polymers and Advanced Materials - Poznan, Poland Duration: 1999 Jun 21 → 1999 Jun 25

Keywords

Crystallization in glass
Defects in glass
Ge-E′ center
Optical nonlinearity
SHG (Second Harmonic Generation)
Silica glass

ASJC Scopus subject areas

Condensed Matter Physics

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10.1080/10587250008025684

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title = "Silica-based glasses as photonic materials-second-order nonlinearity induced by UV-poling",

abstract = "After simultaneous applications of ultraviolet irradiation and a sufficiently high electric field, the so-called UV-poling, silica glass doped with germanium shows quite a large second-order optical nonlinearities in both bulk and film samples, and thus induced d coefficient is comparable to those of LiNbO3 crystal. The induced effect decays after the UV-poling with exactly a single exponential function of time, suggesting a kind of ordered structure formed in the glass by the UV-poling. The decay rate strongly indicates Ge-E′ centers to be relevant agents to the nonlinearity. The decay or degradation can be made much slower with addition of impurities as electron scavengers. Mechanism to give the nonlinearity will be discussed, relating to generation of crystallites in the glass.",

keywords = "Crystallization in glass, Defects in glass, Ge-E′ center, Optical nonlinearity, SHG (Second Harmonic Generation), Silica glass",

author = "Ikushima, {A. J.} and T. Fujiwara",

year = "2000",

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language = "English",

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note = "5th International Conference on Frontiers of Polymers and Advanced Materials ; Conference date: 21-06-1999 Through 25-06-1999",

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AU - Ikushima, A. J.

AU - Fujiwara, T.

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Y1 - 2000/1/1

N2 - After simultaneous applications of ultraviolet irradiation and a sufficiently high electric field, the so-called UV-poling, silica glass doped with germanium shows quite a large second-order optical nonlinearities in both bulk and film samples, and thus induced d coefficient is comparable to those of LiNbO3 crystal. The induced effect decays after the UV-poling with exactly a single exponential function of time, suggesting a kind of ordered structure formed in the glass by the UV-poling. The decay rate strongly indicates Ge-E′ centers to be relevant agents to the nonlinearity. The decay or degradation can be made much slower with addition of impurities as electron scavengers. Mechanism to give the nonlinearity will be discussed, relating to generation of crystallites in the glass.

AB - After simultaneous applications of ultraviolet irradiation and a sufficiently high electric field, the so-called UV-poling, silica glass doped with germanium shows quite a large second-order optical nonlinearities in both bulk and film samples, and thus induced d coefficient is comparable to those of LiNbO3 crystal. The induced effect decays after the UV-poling with exactly a single exponential function of time, suggesting a kind of ordered structure formed in the glass by the UV-poling. The decay rate strongly indicates Ge-E′ centers to be relevant agents to the nonlinearity. The decay or degradation can be made much slower with addition of impurities as electron scavengers. Mechanism to give the nonlinearity will be discussed, relating to generation of crystallites in the glass.

KW - Crystallization in glass

KW - Defects in glass

KW - Ge-E′ center

KW - Optical nonlinearity

KW - SHG (Second Harmonic Generation)

KW - Silica glass

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