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- W2322752309 abstract "We analyze the magnetic response of a dielectric ring of arbitrary width and thickness to an applied timeharmonic magnetic field. The self-consistent polarization current distribution and multiple resonances of magnetic moment are studied. Keywords—metamaterials; terahertz High-permittivity dielectric rings have attracted attention as a promising building block of artificial magnetic media [1]. To ensure the smallness of the electrical size, thick rings must be used. On the one hand, such a ring cannot be described using an equivalent circuit model due to an unknown inhomogeneous current distribution in the ring. On the other hand, the application of FDTD method or FEM becomes both time and memory consuming due to the fine mesh requirement. In this paper, we propose a semi-analytical approach that is suited well to study the resonant properties of high-permittivity particles with rotational symmetry. Similar approach was developed in [2] and [3] with application to thin (planar) rings. Here we study the magnetic resonances and electrical sizes of thick dielectric rings. We consider a dielectric particle of rotationally symmetric shape with a size Lz along the axis of symmetry z. The particle is placed into the magnetic field B = z0B0exp(it), which drives the azimuthal electric field. By using the relationship between the polarization current and the electric field and Faraday’s law, we arrive at the following integral equation for the current density" @default.
- W2322752309 created "2016-06-24" @default.
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- W2322752309 date "2014-06-01" @default.
- W2322752309 modified "2023-09-25" @default.
- W2322752309 title "Magnetic response of thick dielectric rings" @default.
- W2322752309 cites W2035638923 @default.
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- W2322752309 doi "https://doi.org/10.1109/lo.2014.6886409" @default.
- W2322752309 hasPublicationYear "2014" @default.
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