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Principle and design approach of flat nano-metallic surface plasmonic lens

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Abstract

The principle of a flat nano-metallic surface plasmonic lens is analyzed based on phase matching and effective refractive index theory. The complex relationships between the macro-parameters such as focal length with other design freedoms, e.g. material properties of the lens, sheet thickness, slit width, and slit pitch, are disclosed as well. A set of tailored formulae are derived for the design of such a nano-metallic surface plasmonic lens. Several simplified implementations of the nano-metallic lens such as a lens with equidistant slits but bearing different widths, and a lens with equal slit widths but different pitches are given. The performance of the beyond-diffraction-limit focusing effect is given as well.

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Correspondence to H.X. Yuan.

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02.60.Cb; 78.20.Ci; 71.36.+c; 78.68.+m

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Yuan, H., Xu, B., Lukiyanchuk, B. et al. Principle and design approach of flat nano-metallic surface plasmonic lens. Appl. Phys. A 89, 397–401 (2007). https://doi.org/10.1007/s00339-007-4124-4

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  • DOI: https://doi.org/10.1007/s00339-007-4124-4

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