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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. 27, Iss. 7 — Jul. 1, 2010
  • pp: 1555–1560

Electromagnetic enhancement by a single nano-groove in metallic substrate

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


JOSA A, Vol. 27, Issue 7, pp. 1555-1560 (2010)
http://dx.doi.org/10.1364/JOSAA.27.001555


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Abstract

We propose systematic investigations of the electromagnetic enhancement by a single nano-groove in gold substrate. The impacts of the groove parameters and of the illumination conditions on the enhanced intensity are explored using a fully vectorial numerical method. The obtained data can be well predicted and explained by a simple Fabry–Perot model. By virtue of the semi-analytical model, we identify two main factors that enable giant electric-field enhancement in very narrow grooves: the Fabry–Perot resonance and the large wave impedance of the fundamental mode in the groove.

© 2010 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:
Diffraction and Gratings

History
Original Manuscript: January 29, 2010
Revised Manuscript: May 12, 2010
Manuscript Accepted: May 12, 2010
Published: June 3, 2010

Citation
Siwen Zhang, Haitao Liu, and Guoguang Mu, "Electromagnetic enhancement by a single nano-groove in metallic substrate," J. Opt. Soc. Am. A 27, 1555-1560 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-7-1555


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