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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 3 — Feb. 1, 2010
  • pp: 1959–1965

Localized surface plasmons, surface plasmon polaritons, and their coupling in 2D metallic array for SERS

Luping Du, Xuejin Zhang, Ting Mei, and Xiaocong Yuan  »View Author Affiliations


Optics Express, Vol. 18, Issue 3, pp. 1959-1965 (2010)
http://dx.doi.org/10.1364/OE.18.001959


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Abstract

A substrate with ease for fabrication is proposed for surface enhanced Raman spectroscopy (SERS). A two-dimensional dielectric grating covered by a thin silver film enables the excitation of both localized surface plasmons (LSPs) and surface plasmon polaritons (SPPs). The finite-difference time-domain simulation results show that the coupling between LSPs and SPPs is able to highly improve the Raman enhancement (2 × 109 as obtained by simulation). In addition, the near-field distribution at the top of cubic bumps along the transverse plane presents a highly regular hotspots pattern, which is required for an ideal SERS substrate.

© 2010 OSA

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Optics at Surfaces

History
Original Manuscript: August 31, 2009
Revised Manuscript: October 29, 2009
Manuscript Accepted: November 6, 2009
Published: January 19, 2010

Virtual Issues
Vol. 5, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Luping Du, Xuejin Zhang, Ting Mei, and Xiaocong Yuan, "Localized surface plasmons, surface plasmon polaritons, and their coupling in 2D metallic array for SERS," Opt. Express 18, 1959-1965 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-3-1959


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