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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 10 — Oct. 1, 2013
  • pp: 2731–2736

Effects of classical nonlocality on the optical response of three-dimensional plasmonic nanodimers

Cristian Ciracì, Yaroslav Urzhumov, and David R. Smith  »View Author Affiliations


JOSA B, Vol. 30, Issue 10, pp. 2731-2736 (2013)
http://dx.doi.org/10.1364/JOSAB.30.002731


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Abstract

We examine the optical scattering from a variety of axially symmetric plasmonic nanoparticle dimers separated by nanoscale gaps, quantifying the role of classical nonlocality on their optical properties. Due to the rotational symmetry of the analyzed structures, a high degree of accuracy is achieved using a computational approach termed 2.5D modeling, in which a small number of simulations on a two-dimensional domain can replace a memory- and time-intensive simulation on a three-dimensional domain. We find that scattered light from dimers consisting of nanoparticles with flat surfaces, such as nanodisks, exhibits pronounced spectral shifts due to the nonlocality of the electron fluid; these significant shifts persist even at relatively large (>1nm) gap dimensions, where quantum tunneling effects are believed to be negligible. The 2.5D modeling technique accurately incorporates all responses due to any nonaxially symmetric eigenmodes of the system, such as dipolar and quadrupolar modes, thereby providing a complete characterization of the system for any excitation.

© 2013 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.5740) Physical optics : Resonance
(290.5850) Scattering : Scattering, particles
(350.4990) Other areas of optics : Particles

ToC Category:
Physical Optics

History
Original Manuscript: July 18, 2013
Revised Manuscript: August 23, 2013
Manuscript Accepted: August 27, 2013
Published: September 26, 2013

Citation
Cristian Ciracì, Yaroslav Urzhumov, and David R. Smith, "Effects of classical nonlocality on the optical response of three-dimensional plasmonic nanodimers," J. Opt. Soc. Am. B 30, 2731-2736 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-10-2731

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