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
Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00, Brno, Czech Republic.
Institute of Physical Engineering, Brno University of Technology, Technická 2, 616 69, Brno, Czech Republic.
Sci Rep. 2019 Mar 8;9(1):4004. doi: 10.1038/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.
我们展示了一项关于等离子体激元学中巴俾涅互补原理的实验和理论研究。我们使用空间分辨电子能量损失谱和阴极发光来研究基本等离子体激元天线（金盘以及金层中的互补盘形孔径）的电磁响应。我们还计算了它们对平面波照明的响应。虽然已经证实了巴俾涅原理的定性有效性，但发现了与共振的能量和品质因数以及相关近场大小有关的定量差异。特别是，发现孔径与电子束的相互作用比实心天线更强，这使它们成为常规等离子体激元天线设计的一个显著替代方案。我们还研究了基于巴俾涅原理进行磁近场成像的可能性。
