Resonance fluorescence of two adatoms near a metal surface

Abstract
The resonance fluorescence spectrum of two atoms near a perfectly conducting metal is investigated. A quantum-mechanical version of the image method, taking into account the dipole-dipole interaction, is adopted to study the excitation spectrum. Within the framework of this approach, each single atom and its corresponding image are kinematically correlated, while dynamically they are actually independent. The effects of the surface are directly exhibited in the decay rates, the frequency shift, and the spectrum. The influence of the surface is found to be large for weak fields but becomes very small for high intensities of the pump field.