Experimental verification of magnetic near-field channeling using a helical-shaped wire medium lens
Morgado, T. A.
; João, G.
;
Pereira, R. A. M.
;
Fernandes, D. E.
;
Lannebère, S.
Applied Physics Letters Vol. 122, Nº 23, pp. 231704-1 - 231704-6, June, 2023.
ISSN (print): 0003-6951
ISSN (online): 1077-3118
Scimago Journal Ranking: 0,98 (in 2023)
Digital Object Identifier: 10.1063/5.0143807
Abstract
We experimentally verify that a magnetic uniaxial wire medium lens consisting of a racemic array of helical-shaped metallic wires may enable channeling the normal component of the magnetic field of near-field sources with resolution well below the diffraction limit over a broad bandwidth. It is experimentally demonstrated that the helical-shaped wire medium lens can be regarded as the magnetic counterpart of the usual wire medium lenses formed by straight metallic wires. The experimental results are validated with full-wave numerical simulations. We envision that the proposed metamaterial lens may have potential applications in magnetic resonance imaging, near-field wireless power transfer, and sensing.
