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Role of electric currents in the Fano resonances of connected plasmonic structures.

Authors :
Riccardi M
Martin OJF
Source :
Optics express [Opt Express] 2021 Apr 12; Vol. 29 (8), pp. 11635-11644.
Publication Year :
2021

Abstract

In this work, we use finite elements simulations to study the far field properties of two plasmonic structures, namely a dipole antenna and a cylinder dimer, connected to a pair of nanorods. We show that electrical, rather than near field, coupling between the modes of these structures results in a characteristic Fano lineshape in the far field spectra. This insight provides a way of tailoring the far field properties of such systems to fit specific applications, especially maintaining the optical properties of plasmonic antennas once they are connected to nanoelectrodes. This work extends the previous understanding of Fano resonances as generated by a simple near field coupling and provides a route to an efficient design of functional plasmonic electrodes.

Details

Language :
English
ISSN :
1094-4087
Volume :
29
Issue :
8
Database :
MEDLINE
Journal :
Optics express
Publication Type :
Academic Journal
Accession number :
33984940
Full Text :
https://doi.org/10.1364/OE.421951