Abstract
One of the most exciting applications of metaparticles and metasurfaces consists in the magnetic light excitation. However, the principal limitation is due to parasitic extra multipoles of electric family excited in magnetic dipole meta-particles characterized by a radiating nature and corresponding radiating losses. In this paper, we propose the “ideal magnetic dipole” with suppressed additional multipoles except of magnetic dipole moment in the scattered field from a cylindrical object by using mantle cloaking based on metasurface and on anapole concept. The considered metasurface consists of a periodic width modulated microstrip line, with a sinusoidally shaped profile unit cell printed on a dielectric substrate.
Highlights
One of the most exciting applications of metaparticles and metasurfaces consists in the magnetic light excitation
A second limitation is due to the excitation of parasitic extra multipoles of electric family characterized by a radiating nature and corresponding radiating losses
For the realization of the ideal magnetic dipole (MD) scatterer concept, here we propose the design of a structure consisting of an infinitely elongated Perfectly Electric Conductor (PEC) cylinder core and a hybrid PEC metasurface coating with a dielectric layer embedded between them
Summary
One of the most exciting applications of metaparticles and metasurfaces consists in the magnetic light excitation. We propose the “ideal magnetic dipole” with suppressed additional multipoles except of magnetic dipole moment in the scattered field from a cylindrical object by using mantle cloaking based on metasurface and on anapole concept. Inspired by the ideal MD scatterer approach, we should find the current distribution with electric multipoles aE(l, m) scattering intensity tending to zero In this case, Qsca is almost described by the second term in Eq (1), i.e., aM(l, m), given by the magnetic dipole mode. One of the elegant solutions is anapole mode excitation, defined as electric type scattering elimination by toroidal dipole moment at the same frequency[28,29]. The operating frequency corresponds to the minimum radar cross section (RCS) and, it demonstrates collateral mantle cloaking effect
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