Plasmon resonant coupling in metallic nanowires | Zendy

Jörg P. Kottmann | Zendy; Olivier J. F. Martin | Zendy

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Plasmon resonant coupling in metallic nanowires

Author(s) -

Jörg P. Kottmann,

Olivier J. F. Martin

Publication year - 2001

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.8.000655

Subject(s) - plasmon , electric field , polarization (electrochemistry) , raman scattering , optics , surface plasmon resonance , surface plasmon , scattering , nanowire , materials science , localized surface plasmon , coupling (piping) , resonance (particle physics) , molecular physics , raman spectroscopy , physics , optoelectronics , atomic physics , nanoparticle , nanotechnology , chemistry , quantum mechanics , metallurgy

We investigate the plasmon resonances of interacting silver nanowires with a 50 nm diameter. Both non-touching and intersecting configurations are investigated. While individual cylinders exhibit a single plasmon resonance, we observe much more complex spectra of resonances for interacting structures. The number and magnitude of the different resonances depend on the illumination direction and on the distance between the particles. For very small separations, we observe a dramatic field enhancement between the particles, where the electric field amplitude reaches a hundredfold of the illumination. A similar enhancement is observed in the grooves created in slightly intersecting particles. The topology of these different resonances is related to the induced polarization charges. The implication of these results to surface enhanced Raman scattering (SERS) are discussed.

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