Observation of near-field coupling in metal nanoparticle chains using far-field polarization spectroscopy

Stefan A. Maier, Mark L. Brongersma, Pieter G. Kik, Harry A. Atwater

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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 1.4 × 1014 rad/s and a maximum group velocity of vg=4.0×106 m/s for a 75 nm-spacing.

Original languageEnglish
Article number193408
Number of pages4
JournalPhysical Review B
Issue number19
Publication statusPublished - 13 May 2002
Externally publishedYes

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