Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/124484
Title: Geometric frustration in a hexagonal lattice of plasmonic nanoelements
Author: Conde-Rubio, Ana
Fraile Rodríguez, Arantxa
Borrisé, Xavier
Pérez-Murano, Francesc
Batlle Gelabert, Xavier
Labarta, Amílcar
Keywords: Plasmons
Propietats magnètiques
Ressonància de plasmons superficials
Plasmons (Physics)
Magnetic properties
Surface plasmon resonance
Issue Date: 25-Jul-2018
Publisher: Optical Society of America
Abstract: We introduce the concept of geometric frustration in plasmonic arrays of nanoelements. In particular, we present the case of a hexagonal lattice of Au nanoasterisks arranged so that the gaps between neighboring elements are small and lead to a strong near-field dipolar coupling. Besides, far-field interactions yield higher-order collective modes around the visible region that follow the translational symmetry of the lattice. However, dipolar excitations of the gaps in the hexagonal array are geometrically frustrated for interactions beyond nearest neighbors, yielding the destabilization of the low energy modes in the near infrared. This in turn results in a slow dynamics of the optical response and a complex interplay between localized and collective modes, a behavior that shares features with geometrically frustrated magnetic systems.
Note: Reproducció del document publicat a: https://doi.org/10.1364/OE.26.020211
It is part of: Optics Express, 2018, vol. 26, num. 16, p. 20211-20224
URI: http://hdl.handle.net/2445/124484
Related resource: https://doi.org/10.1364/OE.26.020211
ISSN: 1094-4087
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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