Fabrication and tuning of nanoscale metallic ring and split-ring arrays
Scanning electron micrographs showing the effect of (a) underexposure, (b) overexposure, and [(c) and (d)] the resultant problems with lift-off for complete rings.
Scanning electron micrographs of split ring arrays with radii (a) , (b) , and (c) . (d) Scanning electron micrograph of complete radius rings.
Absorption spectra for the split ring arrays shown in Figs. 2(a)–2(c) for (a) electric field polarized parallel to the gap and (b) polarized perpendicular to the gap.
Simulated normalized electric field patterns of (a) the first and (b) the second plasmon resonance of radius split rings.
Comparison of modeling and experimental extinction cross sections for split rings. (a) Parallel polarization and (b) perpendicular polarization and with respect to the gap.
Dimensions and peak positions of split-ring arrays fabricated (nm).
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