Materials that exhibit magnetic resonance have recently attracted interest for synthesizing exotic optical properties of metamaterials. However, none of the known naturally occurring materials are magnetic in the optical regime. Here, we present a metamaterial architecture that exhibits strong magnetic resonance at optical frequencies. The building blocks of the structure are aperiodic clusters of silver nanowires that reveal stronger magnetic resonance than their periodic counterparts. A particular realization exhibits more than three times stronger peak magnetic response than an equivalent periodic array. These results suggest that a larger design space is available for the generation of metamaterials.
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See supplementary material at http://dx.doi.org/10.1063/1.4746753 for the details of effective parameter calculations its dependence on incidence angle.
© 2012 American Institute of Physics.
2012
American Institute of Physics
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