Concentric Ring Structures as Efficient SERS Substrates

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Cinel N. A., Cakmakyapan S., Ertas G., Ozbay E.

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, vol.19, no.3, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 3
  • Publication Date: 2013
  • Doi Number: 10.1109/jstqe.2012.2235824
  • Journal Name: IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Concentric ring, fluorescence imaging, surface-enhanced Raman spectroscopy (SERS), surface plasmon (SP), ENHANCED RAMAN-SCATTERING, PERIODIC ARRAYS, SURFACE, EXCITATION, PLASMONS
  • Middle East Technical University Affiliated: Yes

Abstract

Plasmonic nanopatterned structures that can work as highly efficient surface-enhanced Raman scattering (SERS) substrates are presented in this study. A "coupled" concentric ring structure has been designed, fabricated, tuned, and compared to an "etched" concentric ring structure and plain gold film via SERS experiments. The proposed design gives Raman signal intensity 630 times larger than plain gold film and 8 times larger than an "etched" concentric ring structure. The surface plasmons were imaged with the fluorescence imaging technique and supporting numerical simulations were done.