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Optics Letters

Optics Letters


  • Vol. 36, Iss. 17 — Sep. 1, 2011
  • pp: 3527–3529

Near-field coupling of metal nanoparticles under tightly focused illumination

Jordi Sancho-Parramon  »View Author Affiliations

Optics Letters, Vol. 36, Issue 17, pp. 3527-3529 (2011)

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The influence of strongly focused radiation on the electromagnetic interaction of metal particles is studied. The near-field distribution of silver dimers is calculated by combining a multiple scattering approach and the multipolar expansion of focused beams based on the Richards–Wolf description of diffracting systems. The results show that tight focusing can induce larger maximum field enhancement and stronger localization of the near field than can plane wave illumination. Additional plasmonic resonances can be obtained due to the presence of different polarization contributions at focus.

© 2011 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(290.4210) Scattering : Multiple scattering
(350.4990) Other areas of optics : Particles

ToC Category:
Optics at Surfaces

Original Manuscript: March 21, 2011
Revised Manuscript: August 3, 2011
Manuscript Accepted: August 16, 2011
Published: September 1, 2011

Virtual Issues
Vol. 6, Iss. 10 Virtual Journal for Biomedical Optics

Jordi Sancho-Parramon, "Near-field coupling of metal nanoparticles under tightly focused illumination," Opt. Lett. 36, 3527-3529 (2011)

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