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Updated: Jul 17, 2026

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
Published on: January 3, 2016
Radiation damping in metal nanoparticle pairs
Christian Dahmen1, Benjamin Schmidt, Gero von Plessen
1Institute of Physics (IA), RWTH Aachen University, D-52056 Aachen, Germany.
Abstract:
The radiation damping rate of plasmon resonances in pairs of spherical gold nanoparticles is calculated. The radiative line width of the plasmon resonance indicates significant far-field coupling between the nanoparticles over distances many times the particle diameter. The radiation damping of the coupled particle-plasmon mode alternates between superradiant and subradiant behavior when the particle spacing is varied. At small particle spacings where near-field coupling occurs, the radiation damping rate lies far below that of an isolated particle.
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