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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 23 — Dec. 1, 2012
  • pp: 4898–4900

Analysis of electromagnetic enhancement by a groove doublet in gold substrate

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


Optics Letters, Vol. 37, Issue 23, pp. 4898-4900 (2012)
http://dx.doi.org/10.1364/OL.37.004898


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Abstract

A semianalytical Fabry–Perot model is presented to investigate the electromagnetic enhancement by double grooves in gold substrate. The influence of hybrid wave (HW) propagating along the metal surface on field enhancement is explored systematically with a HW model. Simulation results imply that the hybrid generated by one groove can affect the mode fields in the other groove after propagating along the metallic surface. Giant electromagnetic field intensity at resonance condition is found for the groove distance of 0.6λ with the contribution of surface waves, which is nearly independent of the incidence wavelength and groove width.

© 2012 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:
Physical Optics

History
Original Manuscript: August 20, 2012
Revised Manuscript: October 13, 2012
Manuscript Accepted: October 25, 2012
Published: November 27, 2012

Citation
Siwen Zhang, Haitao Liu, and Guoguang Mu, "Analysis of electromagnetic enhancement by a groove doublet in gold substrate," Opt. Lett. 37, 4898-4900 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-23-4898


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