Stable surface relief grating with second-order nonlinearity on urethane-urea copolymer film

Yanlong Che; Okihiro Sugihara; Hisashi Fujimura; Naomichi Okamoto; Chikara Egami; Yoshimasa Kawata; Masaaki Tsuchimori; Osamu Watanabe

doi:10.1016/S0925-3467(02)00117-9

Stable surface relief grating with second-order nonlinearity on urethane-urea copolymer film

Yanlong Che, Okihiro Sugihara, Hisashi Fujimura, Naomichi Okamoto, Chikara Egami, Yoshimasa Kawata, Masaaki Tsuchimori, Osamu Watanabe

Institute of Multidisciplinary Research for Advanced Materials (IMRAM)

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

10 Citations (Scopus)

Abstract

Surface relief gratings (SRGs) on azobenzene-contained urethane-urea copolymer film with second-order nonlinearity are fabricated by laser-interferometric method. The surface relief structures are obtained upon exposure an interference pattern of a CW Ar⁺ laser and a single-pulse UV laser. The SRG is thermally stable even at T_g of the copolymer. The mechanism of the stability is investigated by comparing the pulse UV laser inscribed SRG. It is suggested that laser ablation of the copolymer surface by the high-power laser irradiation is taken into account. Second-order nonlinearity is induced by corona-poling process after grating formation. Diffraction of second-harmonic generation (SHG) is observed by inserting a fundamental beam, which is in agreement with vector diagram.

Original language	English
Pages (from-to)	79-82
Number of pages	4
Journal	Optical Materials
Volume	21
Issue number	1-3
DOIs	https://doi.org/10.1016/S0925-3467(02)00117-9
Publication status	Published - 2003 Jan

Keywords

Second-order nonlinearity
Surface relief grating
Urethane-urea copolymer

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Computer Science(all)
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

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10.1016/S0925-3467(02)00117-9

Cite this

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title = "Stable surface relief grating with second-order nonlinearity on urethane-urea copolymer film",

abstract = "Surface relief gratings (SRGs) on azobenzene-contained urethane-urea copolymer film with second-order nonlinearity are fabricated by laser-interferometric method. The surface relief structures are obtained upon exposure an interference pattern of a CW Ar+ laser and a single-pulse UV laser. The SRG is thermally stable even at Tg of the copolymer. The mechanism of the stability is investigated by comparing the pulse UV laser inscribed SRG. It is suggested that laser ablation of the copolymer surface by the high-power laser irradiation is taken into account. Second-order nonlinearity is induced by corona-poling process after grating formation. Diffraction of second-harmonic generation (SHG) is observed by inserting a fundamental beam, which is in agreement with vector diagram.",

keywords = "Second-order nonlinearity, Surface relief grating, Urethane-urea copolymer",

author = "Yanlong Che and Okihiro Sugihara and Hisashi Fujimura and Naomichi Okamoto and Chikara Egami and Yoshimasa Kawata and Masaaki Tsuchimori and Osamu Watanabe",

year = "2003",

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doi = "10.1016/S0925-3467(02)00117-9",

language = "English",

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pages = "79--82",

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T1 - Stable surface relief grating with second-order nonlinearity on urethane-urea copolymer film

AU - Che, Yanlong

AU - Sugihara, Okihiro

AU - Fujimura, Hisashi

AU - Okamoto, Naomichi

AU - Egami, Chikara

AU - Kawata, Yoshimasa

AU - Tsuchimori, Masaaki

AU - Watanabe, Osamu

PY - 2003/1

Y1 - 2003/1

N2 - Surface relief gratings (SRGs) on azobenzene-contained urethane-urea copolymer film with second-order nonlinearity are fabricated by laser-interferometric method. The surface relief structures are obtained upon exposure an interference pattern of a CW Ar+ laser and a single-pulse UV laser. The SRG is thermally stable even at Tg of the copolymer. The mechanism of the stability is investigated by comparing the pulse UV laser inscribed SRG. It is suggested that laser ablation of the copolymer surface by the high-power laser irradiation is taken into account. Second-order nonlinearity is induced by corona-poling process after grating formation. Diffraction of second-harmonic generation (SHG) is observed by inserting a fundamental beam, which is in agreement with vector diagram.

AB - Surface relief gratings (SRGs) on azobenzene-contained urethane-urea copolymer film with second-order nonlinearity are fabricated by laser-interferometric method. The surface relief structures are obtained upon exposure an interference pattern of a CW Ar+ laser and a single-pulse UV laser. The SRG is thermally stable even at Tg of the copolymer. The mechanism of the stability is investigated by comparing the pulse UV laser inscribed SRG. It is suggested that laser ablation of the copolymer surface by the high-power laser irradiation is taken into account. Second-order nonlinearity is induced by corona-poling process after grating formation. Diffraction of second-harmonic generation (SHG) is observed by inserting a fundamental beam, which is in agreement with vector diagram.

KW - Second-order nonlinearity

KW - Surface relief grating

KW - Urethane-urea copolymer

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JF - Optical Materials

SN - 0925-3467

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Stable surface relief grating with second-order nonlinearity on urethane-urea copolymer film

Abstract

Keywords

ASJC Scopus subject areas

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