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Proceedings Paper

Photoinduced molecular orientation in bulk azodye-doped polymer by nonresonant femtosecond laser pulses
Author(s): Jinhai Si; Jianrong Qiu; Kazuyuki Hirao
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Paper Abstract

We show two kinds of photoinduced molecular orientations in bulk azodye-doped polymers: photoinduced molecular orientation with centrosymmetry and photoinduced molecular orientation with noncentrosymmetry. For the photoinduced molecular orientation with centrosymmetry, the samples were irradiated with a linearly polarized femtosecond laser whose wavelength (800 nm) was out of the absorption range of the azodye molecules. This photoinduced molecular orientation with centrosymmetry resulted in a birefringence in the sample, based on which an optical image storage was demonstrated. The probe transmittance for the induced birefringence was estimated to be 92%. For the photoinduced molecular orientation with noncentrosymmetry, the sample was irradiated simultaneously by coherent superposition of the 1500-nm fundamental and 750-nm second-harmonic light of a femtosecond laser. The second-harmonic generation (SHG) conversion efficiency of a 105-μm thick film was estimated to be about 2%.

Paper Details

Date Published: 12 May 2004
PDF: 8 pages
Proc. SPIE 5280, Materials, Active Devices, and Optical Amplifiers, (12 May 2004); doi: 10.1117/12.516686
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. 5280:
Materials, Active Devices, and Optical Amplifiers
Connie J. Chang-Hasnain; Dexiu Huang; Yoshiaki Nakano; Xiaomin Ren, Editor(s)

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