Journal ArticleDOI
Direct calculation of permeability and permittivity for a left-handed metamaterial
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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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Frequency adjustable cross-shaped absorber based on graphene
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Proceedings ArticleDOI
Near-field EM scattering by coated objects with Left-Handed Materials
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Broadband carpet cloak consisting of reflectarray with the Ω-shaped elements
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Posted Content
Dynamic Effective Medium Theory for Two-Dimensional Non-Magnetic Metamaterial Lattices using Multipole Expansion
Ioannis Chremmos,Efthymios Kallos,Melpomeni Giamalaki,Vassilios Yannopapas,Emmanuel Paspalakis +4 more
TL;DR: In this article, a formulation for deriving effective medium properties of infinitely periodic two-dimensional metamaterial lattice structures beyond the static and quasi-static limits is presented, where the polarization currents associated with the supported Bloch modes are expressed via the electric dipole, magnetic dipole and electric quadrupole moments per unit length.
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.