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The “basic” structure consisting of a square array of coaxial cylinders, spaced at , with inner Au cylinders with radii and an outer silica cylinder , in a Au film of thickness . The energy flow (arrows) and intensity profile when cylindrical surface plasmons are excited are qualitatively indicated.
The CSP dispersion curves for various values, with the outer radius . The vertical lines indicate the values of corresponding to , with indicated in nm.
Transmission spectra for various and . The arrows indicate the theoretical and CSP resonance peaks. The top panel includes the cases of a perfectly conducting (PC) and a periodicity of (which has the same predicted resonance positions as the , case in the second panel).
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