Optical negative index metamaterials
WebThe recently emerged fields of metamaterials and transformation optics promise a family of exciting applications such as invisibility, … WebMar 9, 2016 · Materials with negative Poisson's ratio or negative refractive index are now classic examples. The effective mass density, which governs the propagation of elastic …
Optical negative index metamaterials
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WebAug 6, 2004 · Abstract. Recently, artificially constructed metamaterials have become of considerable interest, because these materials can exhibit electromagnetic characteristics unlike those of any conventional materials. Artificial magnetism and negative refractive index are two specific types of behavior that have been demonstrated over the past few … WebSep 19, 2024 · Negative refraction, an unnatural optical phenomenon in which the incident and and refracted waves reside on the same side of the face normal, possess have demonstrated with the finding of negative index media based on artificially engineered photonic structures called metamaterials. It has received wide attention due to its …
WebPlasmonic metamaterials are realizations of materials first proposed by Victor Veselago, a Russian theoretical physicist, in 1967. Also known as left-handed or negative index … WebMay 26, 2011 · A metamaterial is an artificial substance engineered to have unnatural properties, such as a negative refractive index. The possibility of creating optical negative-index metamaterials (NIMs) using metallic and dielectric (insulating) nanostructures has triggered intense basic and applied research over the past several years. 1–4 In view of …
WebOptical negative-index metamaterials Artifi cially engineered metamaterials are now demonstrating unprecedented electromagnetic properties that cannot be obtained with … WebFeb 17, 2014 · Dark energy with negative pressure and positive energy density is believed to be responsible for the accelerated expansion of the universe. Quite a few theoretical models of dark energy are based on tachyonic fields interacting with itself and normal (bradyonic) matter. Here, we propose an experimental model of tachyonic dark energy based on …
WebAug 9, 2016 · For example, metamaterials can exhibit negative permittivity ε and/or permeability μ, negative refractive index, near-zero ε values (i.e. ENZ media) or zero (volume) averaged refractive index regions resulting in non …
WebApr 17, 2024 · In this perspective, we have discussed the design strategies, provided examples, and identified future research opportunities for three emerging research … how far is donna tx from penitas txWebOct 14, 2007 · An optical metamaterial is a composite in which subwavelength features, rather than the constituent materials, control the macroscopic electromagnetic properties of the material. Recently ... how far is doncaster from sheffieldWebA negative-index metamaterial causes light to refract, or bend, differently than in more common positive-index materials such as glass lenses. Negative-index metamaterial or negative-index material ( NIM) is a … higgs field massWebJan 1, 2007 · A negative refractive index of n ′ = −0.3 ± 0.1 in the optical range was observed in 2005 at the telecommunication wavelength λ = 1.5 μm in an electron-beam-fabricated sample of paired rods (... how far is downers grove from des plainesWebJan 1, 2009 · 7.1 Recent Advances of Nonlinear Effects in Metamaterials. In all the preceding chapters, we studied the linear properties of optical metamaterials, assuming that the effective electric permittivity ε and magnetic permeability μ are independent of the incident light intensity. Indeed, an overwhelming portion of the experimental results on ... how far is dowagiac from meWebIn particular, three stochastic optimization tools (genetic algorithm, particle swarm optimization, and simulated annealing) are used for designing a low-loss optical negative index metamaterial. A negative refractive index around − 0.8 + 0.2 i is obtained at a wavelength of 770 nm. how far is dover from philadelphiaWebJan 31, 2011 · Metamaterials showing negative refractive indexes, also called negative-index materials (NIMs), have also been demonstrated in the infrared range and at the … how far is downers grove il from me