Journal ArticleDOI
Direct calculation of permeability and permittivity for a left-handed metamaterial
TLDR
In this article, an electromagnetic metamaterial was fabricated and demonstrated to exhibit a "left-handed" (LH) propagation band at microwave frequencies, a situation never observed in naturally occurring materials or composites.Abstract:
Recently, an electromagnetic metamaterial was fabricated and demonstrated to exhibit a “left-handed” (LH) propagation band at microwave frequencies. A LH metamaterial is one characterized by material constants—the permeability and permittivity—which are simultaneously negative, a situation never observed in naturally occurring materials or composites. While the presence of the propagation band was shown to be an inherent demonstration of left handedness, actual numerical values for the material constants were not obtained. In the present work, using appropriate averages to define the macroscopic fields, we extract quantitative values for the effective permeability and permittivity from finite-difference simulations using three different approaches.read more
Citations
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Journal ArticleDOI
A Review of the Scattering-Parameter Extraction Method with Clarification of Ambiguity Issues in Relation to Metamaterial Homogenization
Samel Arslanagic,Troels V. Hansen,Niels Asger Mortensen,A. H. Gregersen,Ole Sigmund,Richard W. Ziolkowski,Olav Breinbjerg +6 more
TL;DR: The scattering-parameter extraction method of metamaterial homogenization is reviewed to show that the only ambiguity is that related to the choice of the branch of the complex logarithmic function (or the complex inverse cosine function).
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A theory of metamaterials based on periodically loaded transmission lines: Interaction between magnetoinductive and electromagnetic waves
TL;DR: In this paper, the propagation of waves in a metamaterial consisting of split ring resonators (SRRs) and metallic rods is considered in several steps, the first involves the rods in isolation, the second the SRRs in isolation and the third a combination of the two, which includes the coupling between neighboring SRRs and allows the propulsion of magneto-inductive (MI) waves.
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Analytic expressions for the constitutive parameters of magnetoelectric metamaterials
TL;DR: It is concluded that the design of metamaterials with tailored simultaneous electric and magnetic response-such as negative index materials-will generally be complicated by potentially unwanted magnetoelectric coupling.
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Calculation and measurement of bianisotropy in a split ring resonator metamaterial
TL;DR: In this paper, a method of directly calculating the magnetoelectric coupling terms using averages over the fields computed from full-wave finite-element based numerical simulations is presented, and the predicted bianisotropy of a fabricated SRR medium is confirmed by measuring the cross polarization of a microwave beam transmitted through the sample.
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Backward wave region and negative material parameters of a structure formed by lattices of wires and split-ring resonators
TL;DR: In this paper, a structure formed by combined lattices of infinitely long wires and split-ring resonators is studied and a dispersion equation is derived and then used to calculate the effective permittivity and permeability in the frequency band where the lattice can be homogenized.
References
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Journal ArticleDOI
The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
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Magnetism from conductors and enhanced nonlinear phenomena
TL;DR: In this paper, it was shown that microstructures built from nonmagnetic conducting sheets exhibit an effective magnetic permeability /spl mu/sub eff/, which can be tuned to values not accessible in naturally occurring materials.
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Composite Medium with Simultaneously Negative Permeability and Permittivity
TL;DR: A composite medium, based on a periodic array of interspaced conducting nonmagnetic split ring resonators and continuous wires, that exhibits a frequency region in the microwave regime with simultaneously negative values of effective permeability and permittivity varepsilon(eff)(omega).
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Effective response functions for photonic bandgap materials
TL;DR: In this article, an effective description for a metalodielectric photonic bandgap (PBG) material was developed for a semi-infinite and slab observables.