Metamaterials with negative permittivity and permeability: background, salient features, and new trends
Nader Engheta
- Vol. 1, pp 187-190
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TLDR
The author presents a brief background and the history of complex media, in particular the materials with negative permittivity and permeability, and then he discusses some of the salient electromagnetic features of these metamaterials.Abstract:
Here the author presents a brief background and the history of complex media, in particular the materials with negative permittivity and permeability, and then he discusses some of the salient electromagnetic features of these metamaterials. This is followed by description of some of the ideas regarding potential future applications of these metamaterials in devices and components, along with physical remarks and intuitive justification.read more
Citations
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A novel composite right-/left-handed coupled-line directional coupler with arbitrary coupling level and broad bandwidth
TL;DR: In this paper, a novel composite right/left-handed (CRLH) backward-wave coupled-line directional coupler with arbitrary coupling level and broad bandwidth is presented, explained by even/odd-mode analysis, validated by full-wave simulations, and demonstrated by experiments.
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Characteristics of the composite right/left-handed transmission lines
TL;DR: In this article, the dispersion diagram of the composite right/left-handed transmission line (CRLH) is obtained analytically based on the Bloch-Floquet theory, and the unique phenomenon of infinite guided-wavelength propagation, with nonzero group velocity at a nonzero frequency, is explained.
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A substrate for small patch antennas providing tunable miniaturization factors
TL;DR: In this paper, a patch antenna tested the performance of the magnetic metamaterial as a substrate and validated that a single substrate can achieve a range of miniaturization values with acceptable loss-factor levels.
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Planar distributed structures with negative refractive index
TL;DR: In this article, a planar distributed periodic structure of microstrip-line and stripline types, which support left-handed (LH) waves is presented and their negative refractive index (NRI) properties are shown theoretically, numerically, and experimentally.
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Tunable metamaterial design composed of triangular split ring resonator and wire strip for s- and c- microwave bands
TL;DR: In this paper, three types of new metamaterials, concentric and non-concentric conflgurations, are designed, and their electromagnetic response is investigated, and constitutive and S parameters are computed using retrieval algorithm.
References
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Negative Refraction Makes a Perfect Lens
TL;DR: The authors' simulations show that a version of the lens operating at the frequency of visible light can be realized in the form of a thin slab of silver, which resolves objects only a few nanometers across.
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The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
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Experimental Verification of a Negative Index of Refraction
TL;DR: These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.
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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).