Effect of coherence on the superluminal propagation of light pulses through anomalously dispersive media with gain

Li Gang Wang*, Nian Hua Liu, Qiang Lin, Shi Yao ZHU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The propagation of pulses through dispersive media was investigated by solving Maxwell's equations without any approximation. It was demonstrated that the superluminal or subluminal pulse propagation originates essentially from the interference of the different frequency components of the pulse. The coherence of the different frequency components plays an important role in superluminal propagation. When the pulse becomes partially coherent, the propagation changes from superluminal to subluminal. Since superluminality always exists as long as the spectrum of the coherent pulse is within the anomalously dispersive region whatever the shape of the pulse is, such a coherent pulse must be transmitted superluminally.

Original languageEnglish
Pages (from-to)834-840
Number of pages7
JournalEurophysics Letters
Volume60
Issue number6
DOIs
Publication statusPublished - Dec 2002

Scopus Subject Areas

  • Physics and Astronomy(all)

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