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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 24 — Nov. 23, 2009
  • pp: 21843–21849

Surface plasmon resonance and field enhancement in #-shaped gold wires metamaterial

W. Q. Hu, E. J. Liang, P. Ding, G. W. Cai, and Q. Z. Xue  »View Author Affiliations

Optics Express, Vol. 17, Issue 24, pp. 21843-21849 (2009)

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A #-shaped gold wires metamaterial is designed for surface enhanced Raman spectroscopy (SERS) and sensing. The tunability of surface plasmon resonance (SPR) excitations, hotspots distribution, localized field enhancement and sensitivity of the structure are investigated. In contrast to most metamaterial, the #-shaped structure exhibits two pronounced SPRs that are insensitive to the polarization of excitation light. Pure electromagnetic Raman enhancement factors of about 106 are achieved on the symmetrically distributed field hotspots. It is possible to break the usable wavelength range of conventional gold SERS substrates via higher order excitations of the #-shaped metamaterial. In addition, the sensitivity and the figure of merits are found to be comparable or even higher than those of conventional SERS substrates. All these factors together with the high reproducibility nature of metamaterial and its simple planer structure suggest that this structure is very promising for surface enhanced spectroscopy and sensing applications.


OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(160.3918) Materials : Metamaterials
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

Original Manuscript: August 26, 2009
Revised Manuscript: October 30, 2009
Manuscript Accepted: November 2, 2009
Published: November 13, 2009

W. Q. Hu, E. J. Liang, P. Ding, G. W. Cai, and Q. Z. Xue, "Surface plasmon resonance and field enhancement in #-shaped gold wires metamaterial," Opt. Express 17, 21843-21849 (2009)

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