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Negative refraction is the electromagnetic phenomenon where light rays become refracted at an interface that is opposite to their more commonly observed positive refractive properties. Negative refraction can be obtained by using a metamaterial which has been designed to achieve a negative value for (electric) permittivity (ε) and (magnetic) permeability (μ); in such cases the material can be assigned a negative refractive index. Such materials are sometimes called "double negative" materials.

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rdfs:label	Réfraction négative (fr) Negative refraction (en) 负折射 (zh)
rdfs:comment	La réfraction négative est un phénomène de réfraction qui ne suit pas les lois de Descartes applicables dans le modèle de l'optique géométrique. Dans ce cas, l'onde réfractée se propage du même côté de la normale à la surface que l'onde incidente. Dans le modèle de l'optique géométrique, ceci serait possible si l'indice optique de réfraction n était négatif, ou encore que la vitesse de phase était négative. Pour l'instant, la réfraction négative n'a été observée expérimentalement que dans le domaine des micro-ondes. (fr) 负折射（英語：Negative refraction）指的是光束在界面处的折射方向与正常折射方向（正常的折射光线与入射光线在法线异侧）相反，即折射光线和入射光线位于法线同侧的电动力学现象。用同时具备负介电常数和负磁导率的超材料可以得到这一现象。此时超材料具负折射率。这样的材料也被称作负折射率材料。负折射会在具备正相速度（正折射率）的介质与负相速度（负折射率）介质的界面处发生。 (zh) Negative refraction is the electromagnetic phenomenon where light rays become refracted at an interface that is opposite to their more commonly observed positive refractive properties. Negative refraction can be obtained by using a metamaterial which has been designed to achieve a negative value for (electric) permittivity (ε) and (magnetic) permeability (μ); in such cases the material can be assigned a negative refractive index. Such materials are sometimes called "double negative" materials. (en)
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dcterms:subject	Articles containing video clips Physical phenomena Photonics Metamaterials
Wikipage page ID	2219887 (xsd:integer)
Wikipage revision ID	1124096424 (xsd:integer)
Link from a Wikipage to another Wikipage	Casimir effect Electromagnetism Electron mobility Metamaterial Bloch's theorem Permittivity Phase velocity Right-hand rule Victor Veselago Refraction Split-ring resonator Light Perfect lens Articles containing video clips General covariance Normal (geometry) Interface (chemistry) Wavenumber Electrical impedance N-slit interferometric equation Photo-Dember Chirality Permeability (electromagnetism) Photonic crystal Physical phenomena Acoustic metamaterials Poynting vector Ray (optics) Group velocity Attenuation Photonics Metamaterials Dielectric Dot product Metamaterial antennas Refractive index Optical medium Snell's law Wave vector Seismic metamaterials Multiple-prism dispersion theory Tunable metamaterials Negative index metamaterials Photonic metamaterials EM radiation Wavevector $http://dbpedia.org/resource/File:Metarefraction.svg$ dbr:File:Negative_refraction.ogv
sameAs	Negative refraction Negative refraction Negative refraction Negative refraction Negative refraction Negative refraction Negative refraction
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has abstract	La réfraction négative est un phénomène de réfraction qui ne suit pas les lois de Descartes applicables dans le modèle de l'optique géométrique. Dans ce cas, l'onde réfractée se propage du même côté de la normale à la surface que l'onde incidente. Dans le modèle de l'optique géométrique, ceci serait possible si l'indice optique de réfraction n était négatif, ou encore que la vitesse de phase était négative. Pour l'instant, la réfraction négative n'a été observée expérimentalement que dans le domaine des micro-ondes. (fr) Negative refraction is the electromagnetic phenomenon where light rays become refracted at an interface that is opposite to their more commonly observed positive refractive properties. Negative refraction can be obtained by using a metamaterial which has been designed to achieve a negative value for (electric) permittivity (ε) and (magnetic) permeability (μ); in such cases the material can be assigned a negative refractive index. Such materials are sometimes called "double negative" materials. Negative refraction occurs at interfaces between materials at which one has an ordinary positive phase velocity (i.e., a positive refractive index), and the other has the more exotic negative phase velocity (a negative refractive index). (en) 负折射（英語：Negative refraction）指的是光束在界面处的折射方向与正常折射方向（正常的折射光线与入射光线在法线异侧）相反，即折射光线和入射光线位于法线同侧的电动力学现象。用同时具备负介电常数和负磁导率的超材料可以得到这一现象。此时超材料具负折射率。这样的材料也被称作负折射率材料。负折射会在具备正相速度（正折射率）的介质与负相速度（负折射率）介质的界面处发生。 (zh)
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is Link from a Wikipage to another Wikipage of	NPV Index of physics articles (N) Reflection (physics) Refraction N-slit interferometric equation Chiral media Chirality Platonic crystal Superlens Akhlesh Lakhtakia Roberto Merlin Doppler effect Sergei Tretyakov (scientist)

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