Origin of Intrinsic Second-Harmonic Generation in Crystallized GeO 2-SiO2 Glass Films

Takumi Fujiwara; Takashi Sawada; Tsuyoshi Honma; Yasuhiko Benino; Takayuki Komatsu; Masahide Takahashi; Toshinobu Yoko; Junji Nishii

doi:10.1143/jjap.42.7326

Origin of Intrinsic Second-Harmonic Generation in Crystallized GeO ₂-SiO₂ Glass Films

Takumi Fujiwara, Takashi Sawada, Tsuyoshi Honma, Yasuhiko Benino, Takayuki Komatsu, Masahide Takahashi, Toshinobu Yoko, Junji Nishii

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

14 Citations (Scopus)

Abstract

The origin and properties of second-harmonic generation (SHG) from crystalline particles and their crystalline phases in GeO₂-SiO ₂ glass films were investigated. GeO₂-SiO₂ glass films with a thickness of approximately 5 μm were fabricated by the chemical vapor-phase deposition (CVD) method. Heat treatments in the temperature range of 1100-1260°C for durations of 2-8 h have been performed to crystallize the glass films. X-ray diffraction (XRD) peaks at around 2θ = 22° in the crystallized GeO₂-SiO₂ films were observed, and the obtained XRD patterns in the glass films are exactly the same as those in ultraviolet (UV) poled GeO₂-SiO₂ glasses with a large second-order optical nonlinearity comparable to that in LiNbO ₃ crystals. Using a SHG microscopic technique, it has been found that the intensity of SHG emission from crystalline particles is clearly dependent on stress-induced optical retardation which is accompanied by the formation of crystalline particles of the pseudo-β-cristobalite containing GeO₂. In addition, a new technique for enhancing the intrinsic SHG by means of modification of defect states is demonstrated.

Original language	English
Pages (from-to)	7326-7330
Number of pages	5
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	42
Issue number	12
DOIs	https://doi.org/10.1143/jjap.42.7326
Publication status	Published - Dec 2003
Externally published	Yes

Keywords

Crystallized glass
Defect-state modification
Ge-doped SiO film
Optical nonlinearity
SHG microscopy

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/jjap.42.7326

Cite this

@article{9c9843b8ef58425597588c730005a322,

title = "Origin of Intrinsic Second-Harmonic Generation in Crystallized GeO 2-SiO2 Glass Films",

abstract = "The origin and properties of second-harmonic generation (SHG) from crystalline particles and their crystalline phases in GeO2-SiO 2 glass films were investigated. GeO2-SiO2 glass films with a thickness of approximately 5 μm were fabricated by the chemical vapor-phase deposition (CVD) method. Heat treatments in the temperature range of 1100-1260°C for durations of 2-8 h have been performed to crystallize the glass films. X-ray diffraction (XRD) peaks at around 2θ = 22° in the crystallized GeO2-SiO2 films were observed, and the obtained XRD patterns in the glass films are exactly the same as those in ultraviolet (UV) poled GeO2-SiO2 glasses with a large second-order optical nonlinearity comparable to that in LiNbO 3 crystals. Using a SHG microscopic technique, it has been found that the intensity of SHG emission from crystalline particles is clearly dependent on stress-induced optical retardation which is accompanied by the formation of crystalline particles of the pseudo-β-cristobalite containing GeO2. In addition, a new technique for enhancing the intrinsic SHG by means of modification of defect states is demonstrated.",

keywords = "Crystallized glass, Defect-state modification, Ge-doped SiO film, Optical nonlinearity, SHG microscopy",

author = "Takumi Fujiwara and Takashi Sawada and Tsuyoshi Honma and Yasuhiko Benino and Takayuki Komatsu and Masahide Takahashi and Toshinobu Yoko and Junji Nishii",

year = "2003",

month = dec,

doi = "10.1143/jjap.42.7326",

language = "English",

volume = "42",

pages = "7326--7330",

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T1 - Origin of Intrinsic Second-Harmonic Generation in Crystallized GeO 2-SiO2 Glass Films

AU - Fujiwara, Takumi

AU - Sawada, Takashi

AU - Honma, Tsuyoshi

AU - Benino, Yasuhiko

AU - Komatsu, Takayuki

AU - Takahashi, Masahide

AU - Yoko, Toshinobu

AU - Nishii, Junji

PY - 2003/12

Y1 - 2003/12

N2 - The origin and properties of second-harmonic generation (SHG) from crystalline particles and their crystalline phases in GeO2-SiO 2 glass films were investigated. GeO2-SiO2 glass films with a thickness of approximately 5 μm were fabricated by the chemical vapor-phase deposition (CVD) method. Heat treatments in the temperature range of 1100-1260°C for durations of 2-8 h have been performed to crystallize the glass films. X-ray diffraction (XRD) peaks at around 2θ = 22° in the crystallized GeO2-SiO2 films were observed, and the obtained XRD patterns in the glass films are exactly the same as those in ultraviolet (UV) poled GeO2-SiO2 glasses with a large second-order optical nonlinearity comparable to that in LiNbO 3 crystals. Using a SHG microscopic technique, it has been found that the intensity of SHG emission from crystalline particles is clearly dependent on stress-induced optical retardation which is accompanied by the formation of crystalline particles of the pseudo-β-cristobalite containing GeO2. In addition, a new technique for enhancing the intrinsic SHG by means of modification of defect states is demonstrated.

AB - The origin and properties of second-harmonic generation (SHG) from crystalline particles and their crystalline phases in GeO2-SiO 2 glass films were investigated. GeO2-SiO2 glass films with a thickness of approximately 5 μm were fabricated by the chemical vapor-phase deposition (CVD) method. Heat treatments in the temperature range of 1100-1260°C for durations of 2-8 h have been performed to crystallize the glass films. X-ray diffraction (XRD) peaks at around 2θ = 22° in the crystallized GeO2-SiO2 films were observed, and the obtained XRD patterns in the glass films are exactly the same as those in ultraviolet (UV) poled GeO2-SiO2 glasses with a large second-order optical nonlinearity comparable to that in LiNbO 3 crystals. Using a SHG microscopic technique, it has been found that the intensity of SHG emission from crystalline particles is clearly dependent on stress-induced optical retardation which is accompanied by the formation of crystalline particles of the pseudo-β-cristobalite containing GeO2. In addition, a new technique for enhancing the intrinsic SHG by means of modification of defect states is demonstrated.

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KW - Optical nonlinearity

KW - SHG microscopy

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