Plasmonic mediated interactions between waveguides and nanostructured metal surfaces.
We present the polarization resolved, angular dependent, optical reflectance properties for single TE mode optical waveguides in contact with a nanostructured gold surface. A substantial angle dependent resonant decrease in the TE polarized surface reflectivity is measured which cannot be explained by a simple waveguide coupling due to surface roughness. Rather we show that the resonance is due to the excitation of a coupled waveguide-plasmonic surface mode created by the interaction between the metal nanostructure and the waveguide. A model based on coupled mode theory is introduced in order to explain the experimental data.
Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland. pierpaolo.porta@tyndall.ie
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D003198:Computer Simulation; D006046:Gold / Q000737:chemistry*; D008027:Light; D008962:Models, Theoretical; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D055096:Optical Devices; D010316:Particle Size; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
D006046:Gold