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A metamaterial based on coupled metallic nanoparticles and its band‐gap property
Author(s) -
ROCKSTUHL C.,
SCHARF T.
Publication year - 2008
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2008.01901.x
Subject(s) - metamaterial , permittivity , materials science , band gap , plasmon , resonance (particle physics) , optoelectronics , metamaterial absorber , surface plasmon resonance , nanoparticle , condensed matter physics , diffraction , optics , nanotechnology , physics , tunable metamaterials , dielectric , atomic physics
Summary The properties of an ensemble of densely packed metallic nanoparticles and the effective material properties of a metamaterial based on them are studied in detail using rigorous diffraction theory. We show that in the spectral vicinity of the plasmon resonance, the metamaterial shows a well‐defined Lorentzian resonance in its effective permittivity whereas the permeability is unaltered. The metamaterial shows a stop band in the spectral domain where the real part of the effective permittivity is negative. Modifying the effective properties of the metamaterial allows efficient tuning of the band‐gap properties. The implementation of the proposed approach towards a band‐gap metamaterial employing self‐organization in liquid crystals is discussed.