Time-frequency dynamics of superluminal pulse transition to the subluminal regime.

@article{Dorrah2015TimefrequencyDO,
  title={Time-frequency dynamics of superluminal pulse transition to the subluminal regime.},
  author={Ahmed H. Dorrah and Abhinav Ramakrishnan and Mo. Mojahedi},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2015},
  volume={91 3},
  pages={033206}
}
Spectral reshaping and nonuniform phase delay associated with an electromagnetic pulse propagating in a temporally dispersive medium may lead to interesting observations in which the group velocity becomes superluminal or even negative. In such cases, the finite bandwidth of the superluminal region implies the inevitable existence of a cutoff distance… CONTINUE READING

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