Saturation and Reverse Saturation of Scattering in a Single Plasmonic Nanoparticle
| Autor: | Hsuan Lee, Shi-Wei Chu, Yen Ta Huang, Tung-Yu Su, Satoshi Kawata, Satoru Shoji, Katsumasa Fujita, Ryosuke Oketani, Masahito Yamanaka, H. y. Wu, Yasuo Yonemaru |
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| Rok vydání: | 2013 |
| Předmět: |
Point spread function
Materials science Nonlinear absorption Scattering business.industry Metallic nanostructures Physics::Optics Nanoparticle Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Optics Chemical physics Electrical and Electronic Engineering Surface plasmon resonance business Saturation (magnetic) Plasmon Biotechnology |
| Zdroj: | ACS Photonics. 1:32-37 |
| ISSN: | 2330-4022 |
| DOI: | 10.1021/ph4000218 |
| Popis: | Nonlinear optical interaction is crucial to all-optical signal processing. In metallic nanostructures, both linear and nonlinear optical interactions can be greatly enhanced by surface plasmon resonance (SPR). In the last few decades, saturation and reverse saturation of absorption in plasmonic materials have been unraveled. It is known that scattering is one of the fundamental light–matter interactions and is particularly strong in metallic nanoparticles due to SPR. However, previous methods measure response from ensemble of nanoparticles and did not characterize scattering on a single particle basis. Here we report that backscattering from an isolated gold nanoparticle exhibits not only saturation, but also reverse saturation. Wavelength-dependent and intensity-dependent studies reveal that nonlinear scattering is dominated by SPR and shares a similar physical origin with nonlinear absorption. The reversibility and repeatability of saturable scattering (SS) and reverse saturable scattering (RSS) are val... |
| Databáze: | OpenAIRE |
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