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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 12 — Jun. 6, 2011
  • pp: 11545–11557

Enhanced transmission through subwavelength apertures by excitation of particle localized plasmons and nanojets

F. J. Valdivia-Valero and M. Nieto-Vesperinas  »View Author Affiliations

Optics Express, Vol. 19, Issue 12, pp. 11545-11557 (2011)

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We study, and illustrate with numerical calculations, transmission enhancement by subwavelength 2D slits due to the dominant role played by the excitation of the eigenmodes of plasmonic cylinders when they are placed at the aperture entrance; and also due to reinforced and highly localized energy in the slit as a consequence of the formation of a nanojet. We show that, providing the illumination is chosen such that an aperture transmitting eigenmode is generated, the phenomenon is independent of whether or not the slit alone produces extraordinary transmission; although in the former case this enhancement will add to this slit supertransmission. We address several particle sizes, and emphasize the universality of this phenomenon with different materials.

© 2011 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1940) Diffraction and gratings : Diffraction
(230.5750) Optical devices : Resonators
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons
(160.4236) Materials : Nanomaterials
(050.6624) Diffraction and gratings : Subwavelength structures
(250.6715) Optoelectronics : Switching

ToC Category:
Diffraction and Gratings

Original Manuscript: March 30, 2011
Manuscript Accepted: April 22, 2011
Published: May 31, 2011

F. J. Valdivia-Valero and M. Nieto-Vesperinas, "Enhanced transmission through subwavelength apertures by excitation of particle localized plasmons and nanojets," Opt. Express 19, 11545-11557 (2011)

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