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Proceedings Paper

Electrochemical control of ultra-small gap distance at metal nanodimer creating highly localized plasmonic field
Author(s): Hiro Minamimoto; Shunpei Oikawa; Xiaowei Li; Kei Murakoshi
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Paper Abstract

The optical property of plasmon-active metal nano dimer structure strongly depends on its shape and gap distance. Thus, the precise control of metal nano structure has been receiving much attention in various field. In the present study, we have tried to control the plasmonic property by combining electrochemical method with in-situ dark-field microscopy. Controlled metal dissolution in the size range below a few nm leads to the successful switching from the charge transfer plasmon (CTP) to the bonding dipolar plasmon (BDP) mode. The highly localized plasmonic field generated during the switching could be applied for various applications including molecular optical trapping in solution at room temperature.

Paper Details

Date Published: 24 April 2018
PDF: 2 pages
Proc. SPIE 10712, Optical Manipulation Conference, 107121B (24 April 2018); doi: 10.1117/12.2320039
Show Author Affiliations
Hiro Minamimoto, Hokkaido Univ. (Japan)
Shunpei Oikawa, Hokkaido Univ. (Japan)
Xiaowei Li, Hokkaido Univ. (Japan)
Kei Murakoshi, Hokkaido Univ. (Japan)

Published in SPIE Proceedings Vol. 10712:
Optical Manipulation Conference
Takashige Omatsu; Hajime Ishihara; Keiji Sasaki, Editor(s)

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