Limits of Babinet's principle for solid and hollow plasmonic antennas

We present an experimental and theoretical study of Babinet's principle of complementarity in plasmonics. We have used spatially-resolved electron energy loss spectroscopy and cathodoluminescence to investigate electromagnetic response of elementary plasmonic antenna: gold discs and complementa...

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Bibliographic Details
Published in:Scientific reports 2019-03, Vol.9 (1), p.4004-4004, Article 4004
Main Authors: Horák, M, Křápek, V, Hrtoň, M, Konečná, A, Ligmajer, F, Stöger-Pollach, M, Šamořil, T, Paták, A, Édes, Z, Metelka, O, Babocký, J, Šikola, T
Format: Article
Language:English
Subjects:
Antennas
Complementarity
Spectroscopy
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Summary:We present an experimental and theoretical study of Babinet's principle of complementarity in plasmonics. We have used spatially-resolved electron energy loss spectroscopy and cathodoluminescence to investigate electromagnetic response of elementary plasmonic antenna: gold discs and complementary disc-shaped apertures in a gold layer. We have also calculated their response to the plane wave illumination. While the qualitative validity of Babinet's principle has been confirmed, quantitative differences have been found related to the energy and quality factor of the resonances and the magnitude of related near fields. In particular, apertures were found to exhibit stronger interaction with the electron beam than solid antennas, which makes them a remarkable alternative of the usual plasmonic-antennas design. We also examine the possibility of magnetic near field imaging based on the Babinet's principle.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-40500-1