A Hertzian Plasmonic Nanodimer as an Efficient Optical Nanoantenna

Details A Hertzian Plasmonic Nanodimer as an Efficient Optical Nanoantenna A Hertzian Plasmonic Nanodimer as an Efficient Optical Nanoantenna

2008-07-11

arxiv.org/abs/0807.1783v1

Physics

Condensed Matter

Materials Science

19 pages, 7 figures

Scientific paper

10.1103/PhysRevB.78.195111

Inspired by the geometry and shape of the classical radio-frequency radiator, the Hertzian dipole, here we analyze the design of a plasmonic optical dimer nanoantenna. We show how it may be possible to operate a pair of closely spaced spherical nanoparticles as an efficient optical nanoradiator, and how its tuning and matching properties may be tailored with great degree of freedom by designing suitable nanoloads placed at the dimer's gap. In this sense, we successfully apply nanocircuit concepts to model the loading nanoparticles. High levels of optical radiation efficiency are achieved, even considering the realistic absorption of optical metals, thanks to this specific geometry and design.

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