Vertically-oriented nanoparticle dimer based on focused plasmonic trapping

Shen, Zhe, Su, Lei and Shen, Yao-chun ORCID: 0000-0002-8915-1993 (2016) Vertically-oriented nanoparticle dimer based on focused plasmonic trapping OPTICS EXPRESS, 24 (14). pp. 16052-16065. ISSN 1094-4087, 1094-4087

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Abstract

We proposed a vertically-oriented dimer structure based on focused plasmonic trapping of metallic nanoparticle. Quantitative FDTD calculations and qualitative analysis by simplified dipole approximation revealed that localized surface plasmon coupling dominates in the plasmon hybridization, and the vertically-oriented dimer can effectively make use of the dominant longitudinal component of the surface plasmon virtual probe thus providing much stronger electric field in the gap. Furthermore, for practical application the top nanoparticle of the dimer can be replaced with an atomic force microscope tip which enables the precise control of the gap distance of the dimer. Therefore the proposed vertically-oriented dimer structure provides both the scanning capability and the extremely-high electrical field necessary for the high sensitivity Raman imaging.

Item Type:	Article
Uncontrolled Keywords:	40 Engineering, 4018 Nanotechnology, Bioengineering, Nanotechnology
Depositing User:	Symplectic Admin
Date Deposited:	13 Jul 2016 09:10
Last Modified:	16 Jan 2026 07:28
DOI:	10.1364/OE.24.016052
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3002280
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