Prediction and Optimization of Surface-Enhanced Raman Scattering Geometries using COMSOL Multiphysics

I. Knorr, K. Christou, J. Meinertz, A. Selle, J. Ihlemann, and G. Marowsky
Laser-Laboratorium Göttingen e.V., Germany

Raman spectroscopy is a commonly used tool in biodiagnostics and sensor technology. Surface-enhanced Raman scattering provides high signal enhancements especially at nanostructured metallic surfaces.

In this paper the electromagnetic Raman enhancement from different metallic nanostructures - including gold coated gratings, spherical and hemispherical particles - is calculated by using the finite element method. It is shown that hemispherical particles on a substrate promise the largest enhancement factors up to seven orders of magnitude.

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