Berlin 2015 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 50: Coupled Nanostructures and Light Localization
O 50.2: Vortrag
Mittwoch, 18. März 2015, 10:45–11:00, MA 043
Tunable plasmon polaritons in cubic crystals of interacting metallic nanoparticles — •Simon Lamowski1, Felicitas Hellbach1, Guillaume Weick2, and Fabian Pauly1 — 1Department of Physics, University of Konstanz, D-78457 Konstanz, Germany — 2Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504, F-67034 Strasbourg, France
In this work we extend previous studies of plasmons supported by interacting metallic nanoparticles in honeycomb [1] and simple cubic lattices [2] to body-centered cubic (bcc) and face-centered cubic (fcc) lattices. The near-field interaction between the localized surface plasmons on each nanoparticle results in collective plasmons that extend over the whole lattice. Considering dipolar interactions up to fourth nearest neighbors, we derive analytical expressions for the collective plasmon dispersion. Following Hopfield [3], we couple the collective plasmons to light to form plasmon polaritons. The plasmon polariton dispersion depends on the direction of the wavevector and the polarization of light. We discuss this dependence for the different lattices and the range of the dipolar interactions [4].
[1] G. Weick, C. Woollacott, W. L. Barnes, O. Hess, and E. Mariani, Phys. Rev. Lett. 110, 106801 (2013).
[2] G. Weick and E. Mariani, Eur. Phys. J. B (2014), to appear; arXiv:1403.2205
[3] J. J. Hopfield, Phys. Rev. 112, 1555 (1958).
[4] S. Lamowski, F. Hellbach, G. Weick, and F. Pauly, in preparation.