A Systemized View of Superluminal Wave Propagation

@article{Withayachumnankul2010ASV,
  title={A Systemized View of Superluminal Wave Propagation},
  author={Withawat Withayachumnankul and Bernd M. Fischer and Bradley Ferguson and Bruce R. Davis and Derek Abbott},
  journal={Proceedings of the IEEE},
  year={2010},
  volume={98},
  pages={1775-1786}
}
This paper reviews earlier studies on superluminal wave propagation in anomalously dispersive media that have been carried out in the electronic, microwave, and optical regimes. Those studies are relevant to observation of modulated Gaussian pulses transmitted through various media at speeds apparently faster than c without distortion. This paper also presents the condition for superluminal propagation that is established based on the magnitude-phase relation of a causal and minimum-phase… 
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References

SHOWING 1-10 OF 114 REFERENCES
Understanding subluminal and superluminal propagation through superposition of frequency components.
  • Wei Guo
  • Physics, Medicine
    Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2006
TLDR
It is exhibited via a multiple-scattering approach that the slab can modify the phase of the pulse's frequency components, so that the peak in the output pulse to appear to travel either faster or slower than in vacuum, depending on whether the slab is absorbing or amplifying.
Transparent anomalous dispersion and superluminal light-pulse propagation at a negative group velocity
Anomalous dispersion cannot occur in a transparent passive medium where electromagnetic radiation is being absorbed at all frequencies, as pointed out by Landau and Lifshitz. Here we show, both
Long-range superluminal pulse propagation in a coaxial photonic crystal
We study the propagation of brief electric pulses along a coaxial line having a spatially periodic impedance. The periodicity causes anomalous dispersion and the appearance of a stop band in
Frequency-domain detection of superluminal group velocity in a distributed Bragg reflector
Using a free-space configuration and a frequency-domain detection setup, group velocities of electromagnetic waves in a distributed Bragg reflector are investigated. Experimental data indicate that,
Characterization of apparent superluminal effects in the focus of an axicon lens using terahertz time-domain spectroscopy
We describe time-resolved measurements of the propagating interference pattern at the focus of an axicon lens. The technique of terahertz time-domain spectroscopy permits a direct observation of the
Gain-assisted superluminal light propagation
TLDR
Gain-assisted linear anomalous dispersion is used to demonstrate superluminal light propagation in atomic caesium gas and is observed to be a direct consequence of classical interference between its different frequency components in an anomalously dispersion region.
Superluminal (but causal) propagation of wave packets in transparent media with inverted atomic populations.
  • Chiao
  • Physics, Medicine
    Physical review. A, Atomic, molecular, and optical physics
  • 1993
The propagation of limited-bandwidth signals, such as Gaussian wave packets, tuned to a transparent spectral region far below the resonance of an inverted two-level atomic medium, can be
Observation of superluminal behaviors in wave propagation
TLDR
The possibility of observing superluminal behavior in the propagation of localized microwaves over distances of tens of wavelengths is experimentally demonstrated and can contribute to answering the question on the luminal limit of the signal velocity.
Quarter-wavelength multilayer interference filter for terahertz waves
Abstract This work presents a multilayer interference filter, suitable for operation with terahertz waves (T-rays). An analysis of the effect of the number of layers on the spectral response is
Anomalous pulse delay in microwave propagation: A plausible connection to the tunneling time.
  • Ranfagni, Fabeni, Pazzi, Mugnai
  • Physics, Medicine
    Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
  • 1993
TLDR
The modulation phase shift, interpreted as a propagation time, turns out to be surprisingly smaller than the one relative to the light speed.
...
1
2
3
4
5
...