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

0508121 - ÚPT 2020 RIV GB eng J - Journal Article
Horák, M. - Křápek, V. - Hrtoň, M. - Konečná, A. - Ligmajer, F. - Stöger-Pollach, M. - Šamořil, T. - Paták, Aleš - Edes, Z. - Metelka, O. - Babocký, J. - Šikola, T.
Limits of Babinet's principle for solid and hollow plasmonic antennas.
Scientific Reports. Roč. 9, MAR (2019), č. článku 4004. ISSN 2045-2322. E-ISSN 2045-2322
Institutional support: RVO:68081731
Keywords : energy-loss spectroscopy * optical-excitations
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.998, year: 2019
Method of publishing: Open access
https://www.nature.com/articles/s41598-019-40500-1

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.
Permanent Link: http://hdl.handle.net/11104/0299106