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Self-assembled hexagonal double fishnets as negative index materials

2011; American Institute of Physics; Volume: 98; Issue: 9 Linguagem: Inglês

10.1063/1.3560444

1520-8842

Kristof Lodewijks, Niels Verellen, W. Van Roy, Victor V. Moshchalkov, Gustaaf Borghs, Pol Van Dorpe,

Plasmonic and Surface Plasmon Research

We show experimentally the successful use of colloidal lithography for the fabrication of negative index metamaterials in the near-infrared wavelength range. In particular, we investigated a specific implementation of the widely studied double fishnet metamaterials, consisting of a gold-silica-gold layer stack perforated by a hexagonal array of round holes. Tuning of the hole diameter allows us to tailor these self-assembled metamaterials both as single- ({\epsilon} < 0) and double ({\epsilon} < 0 and {\mu} < 0) negative metamaterials.