Role of electric currents in the Fano resonances of connected plasmonic structures
| Autor: | Marco Riccardi, Olivier J. F. Martin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Coupling
Physics Condensed matter physics business.industry Physics::Optics Fano resonance Extraordinary optical transmission Near and far field 02 engineering and technology Fano plane 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Optics law 0103 physical sciences nanophotonics Dipole antenna Electric current 0210 nano-technology business Plasmon plasmonic |
| Zdroj: | Optics Express |
| ISSN: | 1094-4087 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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