Light scattering from a dipole near a rough metallic surface

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Abstract
We discuss the resonance fluorescence and absorption spectra pertaining to a dipole near a randomly rough metallic surface. In the framework of a fully quantum-mechanical formulation, the effects of the rough surface are embodied in the statistical properties of the matrix elements that couple surface-plasmon and reflected-wave modes. We analyze the dynamics of the system under the approximation of neglecting the diffuse photon and surface-plasmon (polariton) scattering, yet accounting for the surface-plasmon and photon coupling to all orders. We find that surface-roughness induces distortions in the flat-surface Lorentzian line shape toward a Gaussian line shape as the surface-roughness amplitude increases.