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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 17 — Aug. 18, 2008
  • pp: 12469–12477

Plasmonic band gap structures for surface-enhanced Raman scattering

Askin Kocabas, Gulay Ertas, S. Seckin Senlik, and Atilla Aydinli  »View Author Affiliations


Optics Express, Vol. 16, Issue 17, pp. 12469-12477 (2008)
http://dx.doi.org/10.1364/OE.16.012469


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Abstract

Surface-enhanced Raman Scattering (SERS) of rhodamine 6G (R6G) adsorbed on biharmonic metallic grating structures was studied. Biharmonic metallic gratings include two different grating components, one acting as a coupler to excite surface plasmon polaritons (SPP), and the other forming a plasmonic band gap for the propagating SPPs. In the vicinity of the band edges, localized surface plasmons are formed. These localized plasmons strongly enhance the scattering efficiency of the Raman signal emitted on the metallic grating surfaces. It was shown that reproducible Raman scattering enhancement factors of over 105 can be achieved by fabricating biharmonic SERS templates using soft nano-imprint technique. We have shown that the SERS activities from these templates are tunable as a function of plasmonic resonance conditions. Similar enhancement factors were also measured for directional emission of photoluminescence. At the wavelengths of the plasmonic absorption peak, directional enhancement by a factor of 30 was deduced for photoluminescence measurements.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(300.6450) Spectroscopy : Spectroscopy, Raman
(350.2770) Other areas of optics : Gratings

ToC Category:
Optics at Surfaces

History
Original Manuscript: May 15, 2008
Revised Manuscript: July 5, 2008
Manuscript Accepted: July 6, 2008
Published: August 4, 2008

Virtual Issues
Vol. 3, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Askin Kocabas, Gulay Ertas, S. S. Senlik, and Atilla Aydinli, "Plasmonic band gap structures for surface-enhanced Raman scattering," Opt. Express 16, 12469-12477 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-17-12469


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