Maksymov, Ivan S.Davoyan, Arthur R.Kivshar, Yuri2015-12-162015-12-160003-6951http://hdl.handle.net/1885/95073We introduce a design of Yagi-Uda plasmonic nanoantennas for enhancing the antenna gain and achieving control over the angular emission of light. We demonstrate that tapering of antenna elements allows to decrease spacing between the antenna elements tenfold also enhancing its emission directivity. We find the optimal tapering angle that provides the maximum directivity enhancement and the minimum end-fire beamwidth.This work was supported by the Australian Research Council.http://www.sherpa.ac.uk/romeo/issn/0003-6951..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 17/12/15). Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters and may be found at https://doi.org/10.1063/1.3629787Keywords: Angular emission; Beam widths; Directive gains; Directivity; Directivity enhancement; End-fire; Enhanced Emission; Inter-element spacing; Light control; Nanoantennas; Plasmonic; Plasmons2011-08-2310.1063/1.36297872016-02-24