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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    ABSTRACT: Forward and backward reflection and transmission scattering (S-) parameters of a metamaterial (MM) structure of bi-anisotropic slabs in cascade are analyzed. Signal flow graph technique is applied in this analysis for a cascaded connection of two and three bi-anisotropic MM slabs with different orientations. We also investigated effects of geometrical parameters (fabrication tolerances) of individual MM cells on forward and backward reflection and transmission S-parameters of cascade connection of MM cells. We note from our analysis the following important points. First, forward and backward reflection S-parameters become equal to one another for a MM structure composed of an even number of bi-anisotropic MM slabs (individually characterized by non-identical forward and backward reflection S-parameters) with proper orientations only if there exists symmetry of the structure in the propagation direction. Second, it is noted that it is not possible to obtain identical forward and backward reflection S-parameters of a MM structure composed of an odd number of bi-anisotropic MM slabs. Finally, reflection asymmetry (bi-anisotropy) of cascade connection of MM cells generally is enhanced for a change in geometrical parameters of individual MM cells.
    Optics Communications 08/2015; 348. DOI:10.1016/j.optcom.2015.03.012 · 1.45 Impact Factor
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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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    ABSTRACT: Wireless passive temperature sensors are receiving increasing attention due to the ever-growing need of improving energy efficient and precise monitoring of temperature in high-temperature energy conversion systems, such as gas turbines and coal-based power plants. Unfortunately, the harsh environment, such as high temperature and corrosive atmosphere present in these systems, has significantly limited the reliability and increased the costs of current solutions. Therefore, this paper presents the concept and design of a low cost, passive, and wireless temperature sensor that can withstand high temperature and harsh environments. The temperature sensor was designed following the principle of metamaterials by utilizing closed ring resonators in a dielectric ceramic matrix. The proposed wireless, passive temperature sensor behaves like an $LC$ circuit, which has a temperature-dependent resonance frequency. Full-wave electromagnetic solver Ansys Ansoft HFSS was used to validate the model and evaluate the effect of different geometry and combination of split ring resonator structures on the sensitivity and electrical sizes of the proposed sensor. The results demonstrate the feasibility of the sensor and provide guidance for future fabrication and testing.
    IEEE Sensors Journal 03/2015; 15(3):1445-1452. DOI:10.1109/JSEN.2014.2363095 · 1.76 Impact Factor
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    • "In addition to the materials with simultaneously negative permittivity and negative permeability, the single negative metamaterials have also drawn a great interest. Applications are found for these materials either with a negative permittivity " Epsilon Negative (ENG) " [17] or a negative permeability " Mu Negative (MNG) " [18]. Besides, materials with the properties of " Epsilon near Zero (ENZ) " [19] and " Mu Near Zero (MNZ) " , known as " nihility " materials have also been studied. "
    Metamaterial, 05/2012; , ISBN: 978-953-51-0591-6
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