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Your search keyword '"Konečná, Andrea"' showing total 2 results
Start Over Author "Konečná, Andrea" Topic babinet's principle
2 results on '"Konečná, Andrea"'

1. Independent engineering of individual plasmon modes in plasmonic dimers with conductive and capacitive coupling.

Author

Křápek, Vlastimil, Konečná, Andrea, Horák, Michal, Ligmajer, Filip, Stöger-Pollach, Michael, Hrtoň, Martin, Babocký, Jiří, and Šikola, Tomáš

Subjects
ELECTRON energy loss spectroscopy, DIMERS, NEAR-fields, OPTICAL spectroscopy, NANORODS, ENGINEERING, ENERGY dissipation, BIOSENSORS
Abstract

We revisit plasmon modes in nanoparticle dimers with conductive or insulating junction resulting in conductive or capacitive coupling. In our study, which combines electron energy loss spectroscopy, optical spectroscopy, and numerical simulations, we show the coexistence of strongly and weakly hybridised modes. While the properties of the former ones strongly depend on the nature of the junction, the properties of the latter ones are nearly unaffected. This opens up a prospect for independent engineering of individual plasmon modes in a single plasmonic antenna. In addition, we show that Babinet's principle allows to engineer the near field of plasmon modes independent of their energy. Finally, we demonstrate that combined electron energy loss imaging of a plasmonic antenna and its Babinet-complementary counterpart allows to reconstruct the distribution of both electric and magnetic near fields of localised plasmon resonances supported by the antenna, as well as charge and current antinodes of related charge oscillations. [ABSTRACT FROM AUTHOR]

Published
2020
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2. Limits of Babinet’s principle for solid and hollow plasmonic antennas

Author

A Paták, Vlastimil Křápek, Filip Ligmajer, Andrea Konečná, Tomáš Šikola, Tomáš Šamořil, O. Metelka, Martin Hrtoň, Zoltán Édes, Michal Horák, Michael Stöger-Pollach, Jiří Babocký, Czech Science Foundation, Ministry of Education, Youth and Sports (Czech Republic), Brno University of Technology, Horák, M. [0000-0001-6503-8294], Křápek, V. [0000-0002-4047-8653], Konečná, Andrea [0000-0002-7423-5481], Ligmajer, F. [0000-0003-0346-4110], Šikola, T. [0000-0002-5450-4621], Horák, M., Křápek, V., Konečná, Andrea, Ligmajer, F., and Šikola, T.

Subjects
0301 basic medicine, Plane wave, lcsh:Medicine, Physics::Optics, Cathodoluminescence, Babinet's principle, Article, 03 medical and health sciences, 0302 clinical medicine, Quality (physics), Optics, lcsh:Science, Plasmon, Physics, Multidisciplinary, business.industry, Electron energy loss spectroscopy, lcsh:R, energy-loss spectroscopy, optical-excitations, 030104 developmental biology, Cathode ray, lcsh:Q, Antenna (radio), business, 030217 neurology & neurosurgery
Abstract

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., We acknowledge the support by the Czech Science Foundation (grant No. 17-25799S), Ministry of Education, Youth and Sports of the Czech Republic (projects CEITEC 2020, No. LQ1601, and CEITEC Nano RI, No. LM2015041), and Brno University of Technology (grant No. FSI/STI-J-17-4623).

Published
2019

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