title: Double resonance surface enhanced Raman scattering substrates: an intuitive coupled oscillator model.
abstract: The strong coupling between localized surface plasmons and surface plasmon polaritons in a double resonance surface enhanced Raman scattering (SERS) substrate is described by a classical coupled oscillator model. The effects of the particle density, the particle size and the SiO2 spacer thickness on the coupling strength are experimentally investigated. We demonstrate that by tuning the geometrical parameters of the double resonance substrate, we can readily control the resonance frequencies and tailor the SERS enhancement spectrum.
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, Massachusetts 02138, USA.
authors.forename: Yizhuo
authors.initials: Y
authors.lastname: Chu
authors.forename: Dongxing
authors.initials: D
authors.lastname: Wang
authors.forename: Wenqi
authors.initials: W
authors.lastname: Zhu
authors.forename: Kenneth B
authors.initials: KB
authors.lastname: Crozier
mesh_terms: D015374:Biosensing Techniques; D004867:Equipment Design; D053768:Metal Nanoparticles / Q000737:chemistry; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008962:Models, Theoretical; D036103:Nanotechnology / Q000379:methods; D009991:Oscillometry / Q000379:methods; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D012822:Silicon Dioxide