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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 3 — Feb. 4, 2008
  • pp: 1820–1835

Multiple-multipole simulation of optical nearfields in discrete metal nanosphere assemblies

Wei-Yin Chien and Thomas Szkopek  »View Author Affiliations


Optics Express, Vol. 16, Issue 3, pp. 1820-1835 (2008)
http://dx.doi.org/10.1364/OE.16.001820


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Abstract

We applied a multiple-multipole method to calculate the field enhancement of discrete metal nanosphere assemblies due to plasma resonance, thus performing the first full electromagnetic simulation of a variety of nanoparticle assemblies for efficient field focusing, including the self-similar geometric series of spheres first proposed by Li, Stockman and Bergman. Our study captures electromagnetic resonance effects important for optimizing nanoparticle assemblies to achieve maximum electric field focusing. We predict optical frequency electric fields can be enhanced in gold nanoparticle assemblies in aqueous solution by the order of ~450, within a factor of 2 of that achievable in silver nanostructures. We find that both absorption and far-field scattering resonances of nanoparticle assemblies must be carefully interpreted when inferring near-field focusing properties.

© 2008 Optical Society of America

OCIS Codes
(240.5420) Optics at surfaces : Polaritons
(240.6680) Optics at surfaces : Surface plasmons
(290.4020) Scattering : Mie theory
(160.4236) Materials : Nanomaterials
(250.5403) Optoelectronics : Plasmonics
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: December 12, 2007
Revised Manuscript: January 23, 2008
Manuscript Accepted: January 24, 2008
Published: January 25, 2008

Virtual Issues
Vol. 3, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Wei-Yin Chien and Thomas Szkopek, "Multiple-multipole simulation of optical nearfields in discrete metal nanosphere assemblies," Opt. Express 16, 1820-1835 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-3-1820


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