On the apparent superluminality of evanescent waves
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 inh...
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todo:paper_10944087_v9_n11_p561_Brudny2023-10-03T16:05:15Z On the apparent superluminality of evanescent waves Brudny, V.L. Mochán, W.L. Animation Electromagnetic dispersion Electromagnetic wave reflection Relativity Solitons Vacuum Coherent optical effects Light pulses Pulse propagation and solitons Electromagnetic wave propagation 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. Fil:Brudny, V.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10944087_v9_n11_p561_Brudny |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Animation Electromagnetic dispersion Electromagnetic wave reflection Relativity Solitons Vacuum Coherent optical effects Light pulses Pulse propagation and solitons Electromagnetic wave propagation |
| spellingShingle |
Animation Electromagnetic dispersion Electromagnetic wave reflection Relativity Solitons Vacuum Coherent optical effects Light pulses Pulse propagation and solitons Electromagnetic wave propagation Brudny, V.L. Mochán, W.L. On the apparent superluminality of evanescent waves |
| topic_facet |
Animation Electromagnetic dispersion Electromagnetic wave reflection Relativity Solitons Vacuum Coherent optical effects Light pulses Pulse propagation and solitons Electromagnetic wave propagation |
| description |
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. |
| format |
JOUR |
| author |
Brudny, V.L. Mochán, W.L. |
| author_facet |
Brudny, V.L. Mochán, W.L. |
| author_sort |
Brudny, V.L. |
| title |
On the apparent superluminality of evanescent waves |
| title_short |
On the apparent superluminality of evanescent waves |
| title_full |
On the apparent superluminality of evanescent waves |
| title_fullStr |
On the apparent superluminality of evanescent waves |
| title_full_unstemmed |
On the apparent superluminality of evanescent waves |
| title_sort |
on the apparent superluminality of evanescent waves |
| url |
http://hdl.handle.net/20.500.12110/paper_10944087_v9_n11_p561_Brudny |
| work_keys_str_mv |
AT brudnyvl ontheapparentsuperluminalityofevanescentwaves AT mochanwl ontheapparentsuperluminalityofevanescentwaves |
| _version_ |
1807322537465479168 |