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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 8, Iss. 12 — Jun. 2, 2001
  • pp: 655–663

Plasmon resonant coupling in metallic nanowires

Jörg P. Kottmann and Olivier J.F. Martin  »View Author Affiliations

Optics Express, Vol. 8, Issue 12, pp. 655-663 (2001)

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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.

© Optical Society of America

OCIS Codes
(160.3900) Materials : Metals
(240.5420) Optics at surfaces : Polaritons
(260.3910) Physical optics : Metal optics
(260.5740) Physical optics : Resonance
(290.0290) Scattering : Scattering
(290.5860) Scattering : Scattering, Raman
(350.3950) Other areas of optics : Micro-optics
(350.4990) Other areas of optics : Particles

ToC Category:
Research Papers

Original Manuscript: May 9, 2001
Published: June 2, 2001

Joerg Kottmann and Olivier Martin, "Plasmon resonant coupling in metallic nanowires," Opt. Express 8, 655-663 (2001)

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