Multipolar passive cloaking by nonradiating anapole excitation
Anar K Ospanova1,2, Giuseppe Labate3, Ladislau Matekovits3
1National University of Science and Technology (MISiS), Department of Theoretical Physics and Quantum Technologies, 119049, Moscow, Russia.
Abstract:
In this paper, we demonstrate the relation between cloaking effect and its nonradiating state by considering the destructive multipolar interaction between near-field scattering by bare object and surrounding coating located in its proximity. This cloaking effect is underpinned by anapole mode excitation and it occurs as destructive interference between the electric dipole moment, generated by a bare object (here a central metallic scatterer) and the toroidal moment, formed inside the cloak (a surrounding cluster of dielectric cylinders). Numerical results show how a cloaking effect based on the formation of the anapole mode can lead to an overall nonradiating metamolecule with all-dielectric materials in the coating region.
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