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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 10 — May. 15, 2006
  • pp: 4504–4513

Local-field confinement in three-pair arrays of metallic nanocylinders

Ming-Yaw Ng and Wei-Chih Liu  »View Author Affiliations


Optics Express, Vol. 14, Issue 10, pp. 4504-4513 (2006)
http://dx.doi.org/10.1364/OE.14.004504


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Abstract

Confinement of light in nano-scale region of three silver nanocylinder pairs is studied by finite-difference time-domain simulations. Light is confined in gaps between nanocylinders due to localized plasmon excitation and the strongest local-field enhancement exhibits in the gap of the second pair. The surface plasmon resonance has red-shift for nanocylinders of larger radius. The resonance wavelength and local-field enhancement are nearly proportional to the radius of nanocylinders in visible light region, i.e., the plasmon resonance of nanocylinder pairs is predictable and controllable. An open cavity model is proposed to understand the linear relation between the resonant wavelength and the radius of nanocylinders.

© 2006 Optical Society of America

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

ToC Category:
Optics at Surfaces

History
Original Manuscript: February 23, 2006
Revised Manuscript: April 25, 2006
Manuscript Accepted: April 26, 2006
Published: May 15, 2006

Citation
Ming-Yaw Ng and Wei-Chih Liu, "Local-field confinement in three-pair arrays of metallic nanocylinders," Opt. Express 14, 4504-4513 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-10-4504


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