Electric coupling to the magnetic resonance of split ring resonators. Appl Phys Lett

Department of Physics, University of Crete, Retimo, Crete, Greece
Applied Physics Letters (Impact Factor: 3.3). 07/2004; 84(15). DOI: 10.1063/1.1695439
Source: arXiv


We study both theoretically and experimentally the transmission properties of a lattice of split ring resonators (SRRs) for different electromagnetic (EM) field polarizations and propagation directions. We find unexpectedly that the incident electric field E couples to the magnetic resonance of the SRR when the EM waves propagate perpendicular to the SRR plane and the incident E is parallel to the gap-bearing sides of the SRR. This is manifested by a dip in the transmission spectrum. A simple analytic model is introduced to explain this interesting behavior. Comment: 4 pages, 4 figures

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Available from: M. Kafesaki, Jan 07, 2014
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    • "Depending on direction and polarization of wave and on the structural inhomogeneity (substrate and/or side wall angle), and due to coupling between electric and magnetic fields, MMs can attain bi-anisotropic property [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19]. Bi-anisotropic MMs possess different forward and backward reflection S-parameters [8,17–19], a broader stop-band in transmission [8] [14], magneto-electric coupling coefficient (ξ 0 ) [7] [8] [13], and different reflected and absorbed powers in forward and backward directions [15]. It is generally thought that bi-anisotropy of a MM structure is an undesired property and should be avoided by eliminating the ξ 0 coefficient especially for optical MMs [7,12,16–19]. "
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    • "), six other commonly used SRR structures [23]–[25] (Figure 3) were analyzed to compare the response and sensitivity with the change of substrate thickness (d), split gaps (g) of the ring resonators (Figure 4) and dielectric constant of the ceramic matrix. They are: a) "
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    • "The LC resonance of each SSR is induced when the polarization of the electric field is along the cutwire . Since the electric field component of the incident wave is along the cut-wires, an LC resonance can be induced in the SSRs [19]. In case of a LC resonance in each SSR, two equal FIG. 3 "
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