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|Type:||Artigo de periódico|
|Title:||Propagation speed of evanescent modes|
|Abstract:||The group velocity of evanescent waves tin undersized waveguides, for instance) was theoretically predicted, and has been experimentally verified, to be superluminal (nu (g)>c). By contrast, it is known that the precursor speed in vacuum cannot be larger than c. In this paper, by computer simulations based on Maxwell equations only, we show the existence of both phenomena. In other words, we verify the actual possibility of superluminal group velocities, without violating the so-called (naive) Einstein causality.|
|Editor:||Amer Physical Soc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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