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23 April 2024 |
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Strong spatial dispersion in wire media in the very large wavelength limit | | P.A. Belov
; R. Marques
; S.I. Maslovski
; I.S. Nefedov
; M. Silverinha
; C.R. Simovski
; S.A. Tretyakov
; | | Date: |
11 Nov 2002 | | Subject: | Materials Science | cond-mat.mtrl-sci | | Abstract: | It is found that there exist composite media that exhibit strong spatial dispersion even in the very large wavelength limit. This follows from the study of lattices of ideally conducting parallel thin wires (wire media). In fact, our analysis reveals that the description of this medium by means of a local dispersive uniaxial dielectric tensor is not complete, leading to unphysical results for the propagation of electromagnetic waves at any frequencies. Since non--local constitutive relations have been usually considered in the past as a second order approximation, meaningful in the short wavelength limit, the aforementioned result presents a relevant theoretical interest. In addition, since such wire media have been recently used as a constituent of some discrete artificial media (or metamaterials), the reported results open the question of the relevance of the spatial dispersion in the characterization of these artificial media. | | Source: | arXiv, cond-mat/0211204 | | Services: | Forum | Review | PDF | Favorites | |
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