Non-left-handed transmission and bianisotropic effect in aπ-shaped metallic metamaterial

Abstract

A -shaped metallic metamaterial ͑geometrically, a combination medium of C-shaped resonators and continuous wires͒ is proposed to numerically investigate its transmission band near the resonant frequency, where otherwise it should be a negative-permeability ͑or negative-permittivity͒ stop band if either the C-shaped or continuous-wire constituent is separately considered. However, in contrast to the left-handed materials ͑LHMs͒ composed of split-ring resonators and wires as well as other metallic LHMs, this resonant transmission is a non-left-handed one as a result of the intrinsic bianisotropic effect attributed to the electrically asymmetric configuration of this -shaped metamaterial.

Stepwise technique for accurate and unique retrieval of electromagnetic properties of bianisotropic metamaterials

“…(6) We note that retrieved electromagnetic properties in Fig. 11 prove the statement that there is a transmission band (approximately 8.0-8.8 GHz for our simulations) below the resonance band of cascaded (5 cells in the direction of wave propagation) bianisotropic Composite-II MM slabs demonstrating that, within the transmission band, the omega MM exhibits a right-handed behavior (ε z and μ y ), similar to that in [11]. For brevity purposes, transmission characteristics of all bianisotropic MM slabs in Figs.…”

“…Nonetheless, Pendry et al resolved this problem by proposing a periodic arrangement of split-ring-resonators (SRRs) exhibiting negative μ r [9]. This proposal opened a new path to the electromagnetic community with various types of metallic resonators demonstrating magnetic resonance properties, such as S-shaped resonators [10], π-shaped resonators [11], V-shaped resonators [12], and Omega-shaped resonators [13][14][15][16][17][18][19]. In addition to these resonators, other types of resonators operating at multiple bands based on periodic arrangement of resonators [7,12,20,21], as well as resonators composed of aperiodic/amorphous arrangement of metallic inclusions [22], have also been proposed.…”

Resonance amplification of left-handed transmission at optical frequencies by stimulated emission of radiation in active metamaterials

“…In our numerical simulations based on the full-wave finite element method, the simulation configuration has a dimension of 1×1×5 units (i.e., one unit in the transverse xy-plane and five units in the electromagnetic propagation direction along the z-axis). The polarized incident wave with electric field in the x direction and magnetic field in the y direction is satisfied by applying the perfect electric and magnetic boundary conditions, respectively [18][19][20].…”

Influence of structural parameters on the resonance frequencies of cut-wire pair

“…Therefore, the search for more appropriate and useful magnetic systems is necessary and desirable. To date, besides the early invented SRR structure, several different structures were proposed, such as S-shaped [9], H-shaped [10], cut-wire pair [11], and π-shaped [12] structures. Among them, the cut-wire pair structure has been received a considerable interest, however, the EM response of the cut-wire pair structure has not been fully elucidated yet [11,13].…”

“…To date, besides the early invented SRR structure, several different structures were proposed, such as S-shaped [9], H-shaped [10], cut-wire pair [11], and π-shaped [12] structures. Among them, the cut-wire pair structure has been received a considerable interest, however, the EM response of the cut-wire pair structure has not been fully elucidated yet [11,13]. Furthermore, the main advantages of the cut-wire pair structure, compared to the other structures, is its ability to produce a strong magnetic resonance for the normal-to-plane propagation with only one cut-wire pair layer.…”