Abstract
Using Green's matrix method and resonance capacity concept, surface plasmon resonances of metallic nanostrips are investigated. We first show how the resonance wavelength is determined by the geometric parameters. Then, resonances from visible to near-infrared, depending on the strip size, are obtained. For a specific nanostrip-type, a linear tunability of resonance wavelength is demonstrated from λR = 900 nm to λR = 1800 nm by merely changing the dimensions and keeping the aspect ratio fixed. It is also found that the near field is more enhanced around the thin and long nanostrip. These results can act as a guide in practical design work.
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