Optical properties of a plasmonic nano-antenna: an analytical approach

Details Optical properties of a plasmonic nano-antenna: an analytical approach Optical properties of a plasmonic nano-antenna: an analytical approach

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13e3034g&link_type=abstract

New Journal of Physics, Volume 13, Issue 5, pp. 053034 (2011).

Physics

1

Scientific paper

The optical properties of a plasmonic nano-antenna made of two metallic nanospheroids (prolate or oblate) were investigated analytically in quasi-static approximation. It is shown that in clusters of two nanospheroids, three types of plasmonic modes can be present. Two of them can be effectively excited by a plane electromagnetic wave, while the third one can be effectively excited only by a nanolocalized light source (an atom, a molecule or a quantum dot) placed in the gap between the nanoparticles. Analytical expressions for the absorption cross-section, the enhancement of local fields and the radiative decay rate of an excited atom placed near such a nano-antenna are presented and analyzed.

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