Title: Unidirectional Side Scattering of Light by a Single-Element Nanoantenna
Authors: Vercruysse, Dries ×
Sonnefraud, Yannick
Verellen, Niels
Fuchs, Fabian B
Di Martino, Giuliana
Lagae, Liesbet
Moshchalkov, Victor
Maier, Stefan A
Van Dorpe, Pol #
Issue Date: 25-Jul-2013
Publisher: American Chemical Society
Series Title: Nano Letters vol:13 issue:8 pages:3843-3849
Abstract: Unidirectional side scattering of light by a single-element plasmonic nanoantenna is demonstrated using full-field simulations and back focal plane measurements. We show that the phase and amplitude matching that occurs at the Fano interference between two localized surface plasmon modes in a V-shaped nanoparticle lies at the origin of this effect. A detailed analysis of the V-antenna modeled as a system of two coherent point-dipole sources elucidates the mechanisms that give rise to a tunable experimental directivity as large as 15 dB. The understanding of Fano-based directional scattering opens a way to develop new directional optical antennas for subwavelength color routing and self-referenced directional sensing. In addition, the directionality of these nanoantennas can increase the detection efficiency of fluorescence and surface enhanced Raman scattering.
ISSN: 1530-6984
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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