Journal ArticleDOI
Low frequency plasmons in thin-wire structures
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In this paper, a photonic structure consisting of an extended 3D network of thin wires is shown to behave like a low density plasma of very heavy charged particles with a plasma frequency in the GHz range.Abstract:
A photonic structure consisting of an extended 3D network of thin wires is shown to behave like a low density plasma of very heavy charged particles with a plasma frequency in the GHz range. We show that the analogy with metallic behaviour in the visible is rather complete, and the picture is confirmed by three independent investigations: analytic theory, computer simulation and experiments on a model structure. The fact that the wires are thin is crucial to the validity of the picture. This new composite dielectric, which has the property of negative below the plasma frequency, opens new possibilities for GHz devices.read more
Citations
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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.
Journal ArticleDOI
A Study of Using Metamaterials as Antenna Substrate to Enhance Gain
TL;DR: In this article, simulations are done on the radiation of a dipole antenna embedded in metamaterial substrates, which are composed of a periodic collection of rods, or of both rods and rings.
Journal ArticleDOI
Metamaterials in the Terahertz Regime
TL;DR: The terahertz metamaterials are artificial composites that acquire their electromagnetic properties from embedded subwavelength metallic structures and can be engineered to take on arbitrary values, including those not appearing in nature.
Journal ArticleDOI
Surface polaritons of a left-handed medium
TL;DR: In this paper, the dispersion relations of the surface polaritons of a semi-infinite dispersive medium, which is left-handed (having negative permittivity and permeability) over a frequency range, are obtained.
Journal ArticleDOI
Guided modes in a waveguide filled with a pair of single-negative (SNG), double-negative (DNG), and/or double-positive (DPS) layers
Andrea Alù,Nader Engheta +1 more
TL;DR: In this article, the results of theoretical analysis for guided modes in parallel-plate waveguides filled with pairs of parallel layers made of any two of the following materials are presented: (1) a material with negative real permittivity, but positive real permeability (epsilon-negative); (2) amaterial with negativereal permeability and positive real permitivity (mu-negative), and (3) a conventional material with both negative real and permeability, double-negative, in a given range of frequency.
References
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Journal ArticleDOI
Extremely Low Frequency Plasmons in Metallic Mesostructures
TL;DR: A mechanism for depression of the plasma frequency into the far infrared or even GHz band is proposed: Periodic structures built of very thin wires dilute the average concentration of electrons and considerably enhance the effective electron mass through self-inductance.
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Plasma Losses by Fast Electrons in Thin Films
TL;DR: In this paper, the angle energy distribution of a fast electron losing energy to conduction electrons in a thick metallic foil has been derived assuming that the conduction electron constitute a Fermi-Dirac gas and that the fast electron undergoes only small fractional energy and momentum changes.
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A Collective Description of-Electron Interactions: III. Coulomb Interactions in a Degenerate Electron Gas
TL;DR: In this article, the behavior of the electrons in a dense electron gas is analyzed quantum-mechanically by a series of canonical transformations, and the results are related to the classical density fluctuation approach and Tomonaga's one-dimensional treatment of the degenerate Fermi gas.
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Photonic band structure: The face-centered-cubic case employing nonspherical atoms.
TL;DR: A practical, new, face-centered-cubic dielectric structure which simultaneously solves two of the outstanding problems in photonic band structure and lends itself readily to microfabrication on the scale of optical wavelengths.
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A Collective Description of Electron Interactions: II. Collective vs Individual Particle Aspects of the Interactions
TL;DR: In this article, the behavior of the electrons in a dense electron gas is analyzed in terms of their density fluctuations, which are then split into two components, one component associated with the organized oscillation of the system as a whole, the so-called "plasma" oscillation, and the other component representing the random thermal motion of the individual electrons.