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Phase-matched second-harmonic generation in cross-linking polyurethane films by thermal-assisted optical poling
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10.1063/1.2776876
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    Affiliations:
    1 Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronics and Information Engineering, Xi’an Jiaotong University, Xianing-xilu 28, Xi’an, Shanxi 710049, China and Shanxi Key Laboratory of Information Photonic Technique, School of Electronics and Information Engineering, Xi’an Jiaotong University, Xianing-xilu 28, Xi’an, Shanxi 710049, China
    2 Department of Material Chemistry, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
    a) Electronic mail: jinhaisi@mail.xjtu.edu.cn
    Appl. Phys. Lett. 91, 091105 (2007); http://dx.doi.org/10.1063/1.2776876
/content/aip/journal/apl/91/9/10.1063/1.2776876
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/9/10.1063/1.2776876
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Figures

Image of FIG. 1.
FIG. 1.

Molecular structure (a) and absorption spectrum (b) of the thermal-cross-linking polyurethane with DR19. Cross-linking of the polyurethane was carried out through a thermal chemical reaction between the hydroxyl (OH) groups of the cross-linker and the cyanate (CNO) groups of the prepolymer.

Image of FIG. 2.
FIG. 2.

Decays of the photoinduced SHG of a azopolyurethane film (no cross-linker) (a) and a film (b), which were seeded optically at room temperature and , respectively. All measurements for SHG decays were performed at room temperature.

Image of FIG. 3.
FIG. 3.

Dependence of optical poling of the films on the sample temperature. The films were seeded optically at different temperatures and then cooled to room temperature to measure SHG signals.

Image of FIG. 4.
FIG. 4.

(Color online) Dependence of the photoinduced SHG on the film thickness (a) and the beam pattern of the SHG signal (b). All films were seeded optically at and then were cooled to room temperature to measure SHG signals. Log-log plots with a linear fit of a slope near 2 display SHG intensity dependence on the square of the film thickness.

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/content/aip/journal/apl/91/9/10.1063/1.2776876
2007-08-27
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Phase-matched second-harmonic generation in cross-linking polyurethane films by thermal-assisted optical poling
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/9/10.1063/1.2776876
10.1063/1.2776876
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