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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Proceedings ArticleDOI
Field enhancement effect in graphene-based terahertz nano metasurfaces
Zujun Qin,Ping Xie,Shan Yin +2 more
TL;DR: In this article , the authors discussed the field enhancement effect in terahertz nano metasurfaces and applied them to electric field sensing by assembling a layer of graphene film, where the conductivity of graphene is tuned by varying the scattering time (relaxation time) corresponding to the varying external voltage.
Book ChapterDOI
Computation of Eigenmodes in Periodic Structures with Dispersive Materials
Bastian Bandlow,Rolf Schuhmann +1 more
TL;DR: In this paper, the authors show that the commonly used Drude dispersion model leads to a polynomial eigenvalue problem which can be solved by a modified Jacobi-Davidson method.
Journal ArticleDOI
Broadband graphene and metasurface-loaded solar thermal absorber design for visible and infrared regions
Proceedings ArticleDOI
Electromagnetic metamaterial parameter retrieval methods: A review
TL;DR: Common metamaterial parameter retrieval techniques, that is, S-parameter retrieval, Field averaging, Transfer Matrix and Snell's law are reviewed, and their general principles are discussed.
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.