ENERGY TRANSPORT IN DISPERSIVE MEDIA AND SUPERLUMINAL GROUP VELOCITIES

@inproceedings{Diener1997ENERGYTI,
  title={ENERGY TRANSPORT IN DISPERSIVE MEDIA AND SUPERLUMINAL GROUP VELOCITIES},
  author={Gerhard Diener},
  year={1997}
}
Abstract A new definition of the energy transport velocity for waves in dispersive media is proposed. In general this velocity differs from the group velocity. It can never exceed the vacuum speed of light, not even in the case of superluminal group velocities. The concept also works in the case of waveguides.