Plasmonic band gap structures for surface-enhanced Raman scattering

Date
2008
Advisor
Instructor
Source Title
Optics Express
Print ISSN
10944087
Electronic ISSN
Publisher
Optical Society of American (OSA)
Volume
16
Issue
17
Pages
12469 - 12477
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
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 10 5 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.

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Keywords
Diffraction gratings, Energy gap, Gallium alloys, Metallic soaps, Optical data storage, Plasmons, Scattering, Surface plasmon resonance, Band edges, Band gaps, Bi-harmonic, Enhancement factors, Grating components, Localized surface plasmons, Metallic gratings, Plasmonic band gap structures, Raman signals, Rhodamine 6G, Scattering efficiencies, Surface-enhanced raman scattering, Surface-plasmon polaritons, Raman scattering, rhodamine, rhodamine 6G, article, chemistry, equipment, equipment design, instrumentation, light, radiation scattering, Raman spectrometry, refractometry, surface plasmon resonance, Equipment Design, Equipment Failure Analysis, Light, Refractometry, Rhodamines, Scattering, Radiation, Spectrum Analysis, Raman, Surface Plasmon Resonance
Citation
Published Version (Please cite this version)