Coupling of molecules to surface plasmons in resonant elastic scattering

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Abstract
The two-component structure predicted by Barton in the resonant coupling of molecules to surface plasmons is further investigated. The elastic scattering of light resonant with a molecular excitation near the surface plasmon frequency is considered and the spectral behaviour of the scattered intensity is investigated. The jellium model is adopted for the metal-plus-field system taking account of relativistic dispersion but ignoring hydrodynamic pressure effects. For different sets of the system parameters the existence of the double peaks is clearly demonstrated and the positions of the peaks relative to the surface plasmon frequency, their widths and the division of the total weight between them is discussed.

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