Physics – Classical Physics
Scientific paper
2007-05-23
Metamaterials, vol. 1, no. 2, pp. 89-105, 2007.
Physics
Classical Physics
36 pages, 23 figures
Scientific paper
10.1016/j.metmat.2007.09.003
As an example of thin composite layers we consider single and double grids of periodically arranged interacting wires loaded with a certain distributed reactive impedance. Currents induced to the wires by a normally incident plane wave are rigorously calculated and the corresponding dipole moment densities are determined. Using this data and the averaged fields we assign mesoscopic material parameters for the proposed grid structures. These parameters depend on the number of grids, and measure the averaged induced polarizations. It is demonstrated that properly loaded double grids possess polarization response that over some frequency range can be described by assigning negative values for the mesoscopic parameters. Discussion is conducted on the physical meaningfulness to assign such material parameters for thin composite slabs. The results predicted by the proposed method for the double-grid structures are compared with the results obtained using the commonly adopted S-parameter retrieval procedure.
Gonzalo Ramon
Ikonen Pekka
Saenz Elena
Simovski Constantin
Tretyakov Sergei
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