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Nanoscale interference patterns of gap-mode multipolar plasmonic fields
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| Title: | Nanoscale interference patterns of gap-mode multipolar plasmonic fields |
| Authors: | Tanaka, Yoshito Browse this author | | Sanada, Akio Browse this author | | Sasaki, Keiji Browse this author →KAKEN DB |
| Keywords: | Nanoparticles | | Optical materials and structures | | Applied physics |
| Issue Date: | 24-Oct-2012 |
| Publisher: | Nature Publishing Group |
| Journal Title: | Scientific Reports |
| Volume: | 2 |
| Start Page: | 764 |
| Publisher DOI: | 10.1038/srep00764 |
| Abstract: | Arbitrary spatial distributions of the electric field of light are formed through the interference of individual wavenumber mode fields with appropriate amplitudes and phases, while the maximum wavenumber in the far field is limited by the wavelength of light. In contrast, localized surface plasmons (LSPs) possess the ability to confine photons strongly into nanometer-scale areas, exceeding the diffraction limit. In particular, gap-mode LSPs produce single-nanometer-sized, highly intense localized fields, known as hot spots. Here, we show the nanoscale spatial profiles of the LSP fields within hot spots, which exhibit complicated fine structures, rather than single peaks. The nanopatterns are created by constructive and destructive interferences of dipolar, quadrupolar, and higher-order multipolar plasmonic modes, which can be drastically altered by controlling parameters of the excitation optical system. The analysis in this study would be useful for proposing new concepts for manipulation and control of light-matter interactions in nanospaces. |
| Rights: | http://creativecommons.org/licenses/by-nc-nd/3.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/50795 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 笹木 敬司
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