Surface-Enhanced Electric Intensities on Large Silver Spheroids

Abstract

Electrodynamic calculations of the electric field on the surface of large Ag prolate spheroids indicate that the field enhancement decreases rapidly, the resonance shifts to longer wavelengths and broadens, and a new set of higher-order resonances appears at shorter wavelengths. These results form the basis for comparison with surface-enhanced Raman scattering measurements from lithographically produced Ag microstructures.