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Title: Modeling high-order plasmon resonances of a U-shaped nanowire used to build a negative-index metamaterial

We apply the concept of slow surface-plasmon polariton standing-wave resonances to model the plasmon resonances which exist on split-ring resonators (U-shaped nanowires) forming the unit cell of a metamaterial at infrared frequencies. We compare the expected resonances predicted by the model with full electrodynamic three-dimensional simulations of the U-shaped nanowires for varying geometrical parameters and find a reasonably good agreement. We also consider how far-field dipolar coupling between unit-cells and near-field coupling between the U-shaped nanowire's arms should be taken into account. In addition, we study how the different resonances give rise to negative constitutive parameters for the metamaterial and adjust the geometrical parameters so that the second and third order slow-SPP standing-wave resonances of the U-shaped nanowires result in a double-negative behavior at far-infrared wavelengths without the need of further wires or particles. Finally, we study the effects of stacking N layers of such metamaterial, where each resonant mode splits into N normal mode resonances, showing different electric or magnetic responses. This simple stacked structure maintains the left-handed behavior, exhibiting backward wave propagation.
Authors:
; ; ; ;  [1]
  1. Valencia Nanophotonics Technology Center, Universidad Politecnica de Valencia, Campus del Camino de Vera, 46022 Valencia (Spain)
Publication Date:
OSTI Identifier:
21192538
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 79; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevB.79.075103; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; COUPLING; ELECTRODYNAMICS; INFRARED SPECTRA; LAYERS; QUANTUM WIRES; RESONANCE; RESONATORS; SIMULATION; STANDING WAVES; SURFACES; THREE-DIMENSIONAL CALCULATIONS; WAVE PROPAGATION; WAVELENGTHS