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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Modelling and simulation of dielectric heterostructures: a physical survey from an historical perspective
TL;DR: In this article, the authors reviewed basic physical concepts and theoretical ideas concerning dielectric heterostructures from a historical perspective and concluded that computational techniques provide a versatile tool for studying the dielectrics properties of complex composite materials and that considerable progress can be achieved by comparing numerical results against analytical predictions for the properties of these models.
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Evaluation of lensing in photonic crystal slabs exhibiting negative refraction
Zhi-Yuan Li,Lan-Lan Lin +1 more
TL;DR: In this paper, Luo et al. investigated lensing of electromagnetic waves by a negative refractive-index material slab constructed from a two-dimensional photonic crystal with properly designed equifrequency-surface configuration and found that the overall imaging properties of this photonic slab are dominantly governed by the self-collimation effect and complex near-field wave scattering effect, rather than by the all-angle negative-refraction effect.
Journal ArticleDOI
Photonic approach to making a material with a negative index of refraction
Gennady Shvets,Gennady Shvets +1 more
TL;DR: In this article, a photonic structure consisting of two dielectric materials, with positive and negative dielectrics permittivities, was shown to support electromagnetic surface waves which exhibit the unusual electromagnetic property of left handedness (or negative refraction index).
Experimental observation of true left-handed transmissionpeaks in metamaterials
TL;DR: True left-handed (LH) behavior in a composite metamaterial consisting of a periodically arranged split ring resonator (SRR) and wire structures is reported and it is confirmed experimentally that the effective plasma frequency of the LH material composed of SRRs and wires is lower than the plasma Frequency of the wires.
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Cloaking and transparency for collections of particles with metamaterial and plasmonic covers
Andrea Alù,Nader Engheta +1 more
TL;DR: It is shown how the coupling among the single particles, even when placed in the very near zone of each other, is drastically lowered by the presence of suitably designed covers, thus providing the possibility of making collections of objects transparent and "cloaked" to the impinging radiation even when the total physical size of the system is sensibly larger than the wavelength.
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.