On the electromagnetic properties of active media
classification
⚛️ physics.optics
physics.class-ph
keywords
activemediacausalityconcerningconsiderdiscussdiscussedelectromagnetic
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Several results concerning active media or metamaterials are proved and discussed. In particular, we consider the permittivity, permeability, wave vector, and refractive index, and discuss stability, refraction, gain, and fundamental limitations resulting from causality.
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