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Abstract:

There have been many recent theoretical and experimental reports on the propagation of light pulses at speeds exceeding the speed of light in vacuum c within media with anomalous dispersion, either opaque or with gain. Superluminal propagation has also been reported within vacuum, in the case of inhomogeneous pulses. In this paper we show that the observations of superluminal and non-causal propagation of evanescent pulses under the conditions of frustrated internal reflection are only apparent, and that they can be simply explained employing an explicitly (sub)luminal causal theory. However, the usual one-dimensional approach to the analysis of pulse propagation has to be abandoned and the spatial extent of the incoming pulse along the directions normal to the propagation direction has to be accounted for to correctly interpret the propagation speed of these evanescent waves. We illustrate our theory with animations of the time development of a pulse built upon the Huygen's construction. © 2001 Optical Society of America.

Registro:

Documento: Artículo
Título:On the apparent superluminality of evanescent waves
Autor:Brudny, V.L.; Mochán, W.L.
Filiación:Departamento de Física, Fac. de Ciencias Exactas y Naturales, Pabellón 1, C1428 EHA Buenos Aires, Argentina
Centro de Ciencias Físicas, Univ. Nac. Auton. de Mexico, Apartado Postal 48-3, 62251 Cuernavaca, Morelos, Mexico
Palabras clave:Animation; Electromagnetic dispersion; Electromagnetic wave reflection; Relativity; Solitons; Vacuum; Coherent optical effects; Light pulses; Pulse propagation and solitons; Electromagnetic wave propagation
Año:2001
Volumen:9
Número:11
Página de inicio:561
Página de fin:566
DOI: http://dx.doi.org/10.1364/OE.9.000561
Título revista:Optics Express
Título revista abreviado:Opt. Express
ISSN:10944087
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10944087_v9_n11_p561_Brudny

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Citas:

---------- APA ----------
Brudny, V.L. & Mochán, W.L. (2001) . On the apparent superluminality of evanescent waves. Optics Express, 9(11), 561-566.
http://dx.doi.org/10.1364/OE.9.000561
---------- CHICAGO ----------
Brudny, V.L., Mochán, W.L. "On the apparent superluminality of evanescent waves" . Optics Express 9, no. 11 (2001) : 561-566.
http://dx.doi.org/10.1364/OE.9.000561
---------- MLA ----------
Brudny, V.L., Mochán, W.L. "On the apparent superluminality of evanescent waves" . Optics Express, vol. 9, no. 11, 2001, pp. 561-566.
http://dx.doi.org/10.1364/OE.9.000561
---------- VANCOUVER ----------
Brudny, V.L., Mochán, W.L. On the apparent superluminality of evanescent waves. Opt. Express. 2001;9(11):561-566.
http://dx.doi.org/10.1364/OE.9.000561