Plasmonic band gap structures for surface-enhanced Raman scattering

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2008-08-18

Author

Kocabas, Askin
Ertaş, Gülay
Senlik, S. Seckin
Aydinli, Atilla

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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. (c) 2008 Optical Society of America.

Subject Keywords

Atomic and Molecular Physics, and Optics

URI

https://hdl.handle.net/11511/36080

Journal

OPTICS EXPRESS

DOI

https://doi.org/10.1364/oe.16.012469

Collections

Department of Chemistry, Article

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Citation Formats

A. Kocabas, G. Ertaş, S. S. Senlik, and A. Aydinli, “Plasmonic band gap structures for surface-enhanced Raman scattering,” OPTICS EXPRESS, pp. 12469–12477, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36080.