PROPAGATION OF OPTICAL EXCITATIONS BY DIPOLAR INTERACTIONS IN METAL NANOPARTICLE CHAINS
By W. Weber, G. W. Ford. 2004
378 citations recorded by the source corpus.
Dispersion relations for dipolar modes propagating along a chain of metal nanoparticles are calculated by solving the full Maxwell equations, including radiation damping. The nanoparticles are treated as point dipoles, which means the results are valid only for a/d <= 1/3, where a is the particle radius and d the spacing. The discrete modes for a finite chain are first calculated, then these are mapped onto the dispersion relations appropriate for the infinite chain. Computed results are given for a chain of 50-nm diameter Ag spheres spaced by 75 nm. We find large deviations from previous quasistatic results: Transverse modes interact strongly with the light line. Longitudinal modes develop a bandwidth more than twice as large, resulting in a group velocity that is more than doubled. All modes for which k_mode <= w/c show strongly enhanced decay due to radiation damping.
Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/ebcb3d40a3fc59755bef91b3dd17eb7370ed37bb
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In Biomedical Engineering
- Andrea Alù
- Nader Engheta
- S. A. Maier
- John F. O'Hara
- Vladimir M. Shalaev
- Alexandra Boltasseva
- Ari Henrik Sihvola
- Pierre Berini
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Plasmonics: Fundamentals and Applications (2007, background): “7.22), due to phase-matching between the transverse dipolar mode to photons propagating along the waveguide at the same frequency [Weber and Ford, 2004, Citrin, 2005b, Citrin, 2004].”
- Theory of linear chains of metamaterial/plasmonic particles as subdiffraction optical nanotransmission lines (2006, background): “Moreover, these summations diverge for complex solutions of β , as noticed in [20].”
- An Overview of the Theory and Applications of Metasurfaces: The Two-Dimensional Equivalents of Metamaterials (2012, background): “Another emerging area of application is the use of one-dimensional chains of nanoparticles as waveguides supporting surface waves, of which examples could be found in [124-130].”