Abstract
Far-field polarization spectroscopy on chains of Au nanoparticles reveals the existence of longitudinal (L) and transverse (T) plasmon-polariton modes. The experimental results provide support for the validity of a recently published dipole model for electromagnetic energy transfer below the diffraction limit along chains of closely spaced metal nanoparticles. The key parameters that govern the energy transport are determined for various interparticle spacings using measurements of the resonance frequencies of L and T modes, yielding a bandwidth of and a maximum group velocity of for a 75 nm-spacing.
- Received 12 March 2002
DOI:https://doi.org/10.1103/PhysRevB.65.193408
©2002 American Physical Society