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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 28, Iss. 5 — May. 1, 2011
  • pp: 879–886

Electromagnetic enhancement by a periodic array of nanogrooves in a metallic substrate

Siwen Zhang, Haitao Liu, and Guoguang Mu  »View Author Affiliations


JOSA A, Vol. 28, Issue 5, pp. 879-886 (2011)
http://dx.doi.org/10.1364/JOSAA.28.000879


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Abstract

We present comprehensive investigations of the electromagnetic enhancement by a periodic array of rectangular nanogrooves in a metallic substrate. The impacts of array parameters and of illumination conditions on the enhanced electric-field intensity are explored using fully vectorial methods. The calculations are performed mainly for gold and for the visible and infrared wavelengths. The fully vectorial results are reproduced and explained by a simple Fabry–Perot model. Compared with the case of a single groove, the electric-field enhancement of the groove array is found to be much higher by almost 1 order of magnitude, which is shown to be related to the excitation of surface plasmon polaritons with the aid of the model. Practical considerations of a finite groove number and of a finite groove length are also provided.

© 2011 Optical Society of America

OCIS Codes
(260.2110) Physical optics : Electromagnetic optics
(260.3910) Physical optics : Metal optics
(050.6624) Diffraction and gratings : Subwavelength structures
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: January 6, 2011
Manuscript Accepted: February 24, 2011
Published: April 22, 2011

Citation
Siwen Zhang, Haitao Liu, and Guoguang Mu, "Electromagnetic enhancement by a periodic array of nanogrooves in a metallic substrate," J. Opt. Soc. Am. A 28, 879-886 (2011)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-28-5-879


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