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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Surface engineering to control electromagnetic waves across the spectrum
TL;DR: In this article, the concepts of engineered surfaces for the control of electromagnetic waves are introduced and contextualized into the three main applications studied: (i) structures for the enhancement of scanning performances of phased arrays; (ii) dielectric resonators lenses and flat components; (iii) super oscillatory lenses.
Dissertation
Controlling flexural waves using subwavelength perfect absorbers : application to Acoustic Black Holes
TL;DR: In this paper, a methode de conception de resonateurs simplespour une absorption efficace des ondes de flexion is proposed for le domaine elastodynamique.
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Electrical circuit model of arrays of resonant elements
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Zero-permeability materials: an artifact of losses in LHM left-handed media
TL;DR: In this paper, the physical properties of a zero-permeability material (or ZμM) were evaluated through analysis of electromagnetic transmission using realistic parametric conditions for artificial left-handed media (LHM) or negative index materials.
Journal ArticleDOI
Study on left-handed effect of composite helices and its application in square frame patch antennas
TL;DR: In this article, the authors used the finite difference time domain (FDTD) method to study the characteristics of composite helices patch antenna based on left-handed effect, and the numerical results indicate that electromagnetic wave resonance occurs near f ǫ = 4.18 GHz where the equivalent permittivity and permeability are both negative.
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.