Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 21: Plasmonics and Nanooptics III: Light-Matter Interaction
O 21.2: Vortrag
Montag, 20. März 2017, 17:15–17:30, TRE Ma
Plasmon polaritons in cubic lattices of interacting metallic nanoparticles — •Simon Lamowski1, Felicitas Hellbach1, Eros Mariani2, Guillaume Weick3, and Fabian Pauly1 — 1Department of Physics, University of Konstanz, D-78457 Konstanz, Germany — 2Centre for Graphene Science, Department of Physics and Astronomy, University of Exeter, Stocker Rd. EX4 4QL Exeter, UK — 3Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, F-67034 Strasbourg, France
We investigate theoretically plasmon polaritons in cubic lattices of interacting spherical metallic nanoparticles [1]. Dipolar localized surface plasmons on each nanoparticle couple through the near field dipole-dipole interaction and form collective plasmons, which extend over the whole metamaterial. Coupling these collective plasmons in turn to photons leads to plasmon polaritons. We derive within a quantum model general semi-analytical expressions to evaluate both plasmon and plasmon-polariton dispersions that fully account for nonlocal effects in the dielectric function of the metamaterial. Within this model, we discuss the influence of different lattice symmetries and predict related polaritonic gaps within the near-infrared to the visible range of the spectrum that depend on wavevector direction and polarization.
[1] S. Lamowski, F. Hellbach, E. Mariani, G. Weick, and F. Pauly, arXiv:1606.04897.