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Proceedings Paper

Photoinduced microstructures inside bulk azodye-doped polymers by the coherent field of a femtosecond laser
Author(s): Jinhai Si; Jianrong Qiu; Kazuyuki Hirao
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Paper Abstract

Two kinds of photoinduced periodic microstructures in azodye-doped polymethylmethacrylate were fabricated by interference of two coherent beams of a nonresonant femtosecond laser. One is volume holographic gratings induced by interference of two fs-laser beams with same frequency; the other is molecular polar orientation induced by dual-frequency coherent fs-laser excitation at fundamental and second harmonic frequencies. The photoinduced holographic gratings consist of two surface relief gratings and refractive index modulated gratings in the interior of the polymers. Diffraction efficiency up to 90% of the first-order Bragg for the gratings was obtained. For the photoinduced molecular polar orientation, three kinds of noncentrosymmetries of the polymer films were optically tailored using appropriate combinations of the writing beam polarizations.

Paper Details

Date Published: 1 August 2003
PDF: 6 pages
Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003);
Show Author Affiliations
Jinhai Si, Japan Science and Technology Corp. (Japan)
Jianrong Qiu, Japan Science and Technology Corp. (Japan)
Kazuyuki Hirao, Japan Science and Technology Corp. (Japan)

Published in SPIE Proceedings Vol. 4948:
25th International Congress on High-Speed Photography and Photonics
Claude Cavailler; Graham P. Haddleton; Manfred Hugenschmidt, Editor(s)

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