Journal ArticleDOI
Direct calculation of permeability and permittivity for a left-handed metamaterial
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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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Proceedings ArticleDOI
The thin wire model for thick and highly curved wire structures
Alexander Heldring,Juan M. Rius +1 more
TL;DR: In this paper, some aspects of using the thin wire model in the method of moments on relatively thick wire antennas and scatterers are investigated, specifically the treatment of the extremities of the geometry, and the limitations inherent in the thin wires model when applied to highly curved wire structures.
Dissertation
Etude et conception de structures à base de métamatériaux pour application aux circuits microondes et antennes
TL;DR: In this article, the split ring resonator and its complementary, of very small dimensions compared to wavelength, were studied in a narrow frequency band around its resonances and the obtained results confirm that the metamaterial resonators, considered within the context of this thesis, improve considerably the performance of the targeted applications.
Journal ArticleDOI
A racemic approach to left-handed media
TL;DR: It is established theoretically that racemic substances characterized by isomers with strong optical rotatory power are capable of producing negative refraction and focusing of arbitrarily polarized waves, and a slab of such racemic material, while not chiral, acts just like Veselago's hypothetical left-handed media slab, providing subwavelength resolution as Pendry's ideal lens does.
Journal ArticleDOI
Ground states for Maxwell’s equations in nonlocal nonlinear media
TL;DR: In this article , the existence of ground states and dual ground states for Maxwell's Equations in $${\mathbb {R}}^3$$ in nonlocal nonlinear metamaterials is investigated.
References
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Journal ArticleDOI
The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
Journal ArticleDOI
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.
Journal ArticleDOI
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).
Journal ArticleDOI
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.