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Enhanced emission and light control with tapered plasmonic nanoantennas
11. C. A. Balanis, Antenna Theory: Analysis and Design (John Wiley and Sons, New Jersey, 2005).
12. T. A. Milligan, Modern Antenna Design (John Wiley and Sons, New Jersey, 2005).
20. E. D. Palik, Handbook of Optical Constants of Solids (Academic, New York, 1985).
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We introduce a design of Yagi-Uda plasmonic nanoantennas for enhancing the directive gain and achieving control over the angular emission of light. We demonstrate that tapering of nanoantenna elements allows to decrease the inter-element spacing tenfold also enhancing the emission directivity. We find the optimal tapering angle that provides the maximum directivity enhancement and the minimum end-fire beamwidth.
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