Polarization dependent second harmonic generations of equilateral triangular Au nanorods at localized surface plasmon resonances
| Autor: | Atsushi Sugita, Hirofumi Yogo, Atsushi Ono, Yoshimasa Kawata |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Physics::Optics 02 engineering and technology Electron 021001 nanoscience & nanotechnology Polarization (waves) Equilateral triangle 01 natural sciences Molecular physics 010309 optics Optics 0103 physical sciences Nanorod Polarization dependent 0210 nano-technology business Anisotropy Excitation Localized surface plasmon |
| Zdroj: | Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XV. |
| Popis: | The paper presents second harmonic generations (SHG) from Au nanoprisms at localized surface plasmon resonances. The model system was equilateral triangular nanoprisms that were arranged two-dimensionally in trigonal lattices. At lower excitation power regions, the SHG conversion efficiencies were almost independent of the excitation light polarization angles, while the polarization angles of the SHG waves were twice as much as those of the excitation light polarizations. The polarization dependencies were in a good agreement with the demands required from the C3v point symmetry of the systems. On the other hand, the SHG conversion efficiencies were dependent on the excitation light polarization angles at higher excitation power regions. The anisotropy in the nonlinear optical responses was explained from the viewpoint of the polarization-dependent depletions of the surface electrons on the metal surfaces. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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