Optical second harmonic generation from Pt nanowires
| Autor: | Goro Mizutani, K. Aratake, N. Hayashi, Tetsuya Iwai, Haruyuki Sano, R. Okushio, Akira Sugawara |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Condensed matter physics Field (physics) business.industry Nanowire General Physics and Astronomy Second-harmonic generation Optical polarization Surfaces and Interfaces General Chemistry Photon energy Condensed Matter Physics Surfaces Coatings and Films Optics business Anisotropy Deposition (law) Excitation |
| Zdroj: | Applied Surface Science. 253:8933-8938 |
| ISSN: | 0169-4332 |
| Popis: | We have measured optical second harmonic intensity from arrays of Pt nanowires of 20 nm and 9 nm average widths, as a function of the incident and output light polarizations, the azimuthal angle, and the excitation photon energy. The nanowires were fabricated through shadow deposition on self-organized NaCl(1 1 0) faceted templates. The anisotropy of the SH intensity from the Pt nanowires was found to be stronger than that from the Au nanowires reported previously. The effective nonlinear susceptibility element χ 222 ( 2 ) , with the suffix 2 indicating the direction [ 1 1 ¯ 0 ] , was observed for Pt nanowires, although it was not observed for Au nanowires. This difference is suggested to be due to the weaker suppression of the incident fundamental fields by the depolarization field in the Pt nanowires and the larger anisotropy in the nonlinearity of Pt nanowires due to the thinner widths. |
| Databáze: | OpenAIRE |
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