11 October 2007 Dielectric and geometric properties of plasmonics in metal/dielectric nanowires composites used in surface-enhanced Raman spectroscopy
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Abstract
Finite elements calculations have been performed of the surface enhanced Raman (SERS) activity of Ag coated dielectric nanowires. It is shown that the SERS fields and the angle of the peak field from intersecting nanowires can be changed through the angle of the nanowires. In addition, it is shown that the strength of the SERS enhancement and its spatial profile depend on whether the nanowires are in free space or on a substrate. Experimental data for benzene thiol on dielectric coated nanowires is shown to support the calculations. These results demonstrate the importance of geometry and local environment on electric field hot spots in the SERS process.
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O. J. Glembocki, O. J. Glembocki, R. W. Rendell, R. W. Rendell, S. M. Prokes, S. M. Prokes, D. A. Alexson, D. A. Alexson, M. A. Mastro, M. A. Mastro, S. C. Badescu, S. C. Badescu, A. Fu, A. Fu, } "Dielectric and geometric properties of plasmonics in metal/dielectric nanowires composites used in surface-enhanced Raman spectroscopy", Proc. SPIE 6768, Nanomaterials Synthesis, Interfacing, and Integrating in Devices, Circuits, and Systems II, 676802 (11 October 2007); doi: 10.1117/12.751384; https://doi.org/10.1117/12.751384
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