Refractive non-linearity in double-sided nanosize films containing methanofullerene derivative fabricated by electrostatic self-assembly technique
✍ Scribed by Qiuyun Ouyang; Xueru Zhang; Wang Zhang; Li Jiang; Yuxiao Wang; Yinglin Song; Yuliang Li
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 178 KB
- Volume
- 252
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
The non-linear optical properties of the double-sided nanosize films containing a methanofullerene derivative and its solution were investigated by Z-scan technique with an 8 ns, 532 nm Nd:YAG laser system. The films were fabricated using the electrostatic layer-by-layer self-assembly technique. The materials contained a positively charged trifluoroacetic acid salt of triamino-substitute methanofullerene derivative and a negatively charged poly (sodium 4-styrenesulfonate). The 20-bilayer film shows strong self-defocusing effect with a non-linear refractive index n 2 of À7.0 • 10 À6 esu, which was extracted from the experimental data based on the Huygens-Fresnel diffraction integral. On the other hand, the solution exhibits great reverse saturation absorption effect.