Simultaneous Negative Phase and Group Velocity of Light in a Metamaterial

@article{Dolling2006SimultaneousNP,
  title={Simultaneous Negative Phase and Group Velocity of Light in a Metamaterial},
  author={Gunnar Dolling and Christian Enkrich and Martin Wegener and Costas M. Soukoulis and Stefan Linden},
  journal={Science},
  year={2006},
  volume={312},
  pages={892 - 894}
}
We investigated the propagation of femtosecond laser pulses through a metamaterial that has a negative index of refraction for wavelengths around 1.5 micrometers. From the interference fringes of a Michelson interferometer with and without the sample, we directly inferred the phase time delay. From the pulse-envelope shift, we determined the group time delay. In a spectral region, phase and group velocity are negative simultaneously. This means that both the carrier wave and the pulse envelope… 
Controlling the propagation velocity of a femtosecond laser pulse with negative index metamaterials.
TLDR
It is shown that its propagation velocity can be easily controlled at a certain wavelength range simply by changing the initial chirp, which may be used as an extremely simple way to control the propagation velocity of a femtosecond laser pulse.
Controlling ultrafast light with dispersive metamaterials
Because metamaterials often utilize strong resonances, a strong group delay dispersion (GDD) is also possible. This property is an important parameter for ultrafast laser pulse propagation. The
Experimental determination of the dispersion relation of light in metamaterials by white-light interferometry
We present a method to experimentally measure the complex reflection and transmission coefficients of optical waves at metamaterials under normal incidence. This allows us to determine their
Chirp as a tool to control the propagation velocity of a femtosecond laser pulse in negative index metamaterials
We study theoretically propagation of a femtosecond laser pulse in a negative-index metamaterial (NIM). Our results show that at a certain wavelength range one can control the propagation velocity of
Envelope-Only Pulse Propagation in Almost-Dispersion-Free Matched Metamaterials Near Frequency of Zero Refractive Index
In this paper, we numerically exploit the material-model-dependent pulse propagation nature in a zero-refractive-index metamaterial medium mainly from the aspect of the possibility of dispersion-free
Negative beam displacements from negative-index photonic metamaterials.
TLDR
Numerical calculations reveal negative beam displacements from state-of-the-art double-fishnet-type photonic metamaterials and present exact analytical calculations for thin metal films showing that, in wave optics, the sign of the beam displacement is generally not identical to theSign of the refractive index.
Negative group delay through subwavelength hole arrays
It is demonstrated that superluminal transmission with a negative group delay can be obtained through a periodic grating supporting resonant and Rayleigh-Wood anomalies. Theoretical, numerical, and
Negative Refraction at Visible Frequencies
TLDR
An experimental realization of a two-dimensional negative-index material in the blue-green region of the visible spectrum is demonstrated, substantiated by direct geometric visualization of negative refraction, which may enable the development of practical negative- index optical designs in the visible regime.
Simultaneous realization of negative group velocity, fast and slow acoustic waves in a metamaterial
An acoustic metamaterial is designed based on a simple and compact structure of one string of side pipes arranged along a waveguide, in which diverse group velocities are achieved. Owing to
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 15 REFERENCES
Negative index of refraction in optical metamaterials.
A double-periodic array of pairs of parallel gold nanorods is shown to have a negative refractive index in the optical range. Such behavior results from the plasmon resonance in the pairs of nanorods
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.
Experimental Verification of a Negative Index of Refraction
TLDR
These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.
Experimental demonstration of near-infrared negative-index metamaterials.
TLDR
The first fabrication and experimental verification of a transversely structured metal-dielectric-metal multilayer exhibiting a negative refractive index around 2 microm is reported.
Linear Pulse Propagation in an Absorbing Medium
The pulse velocity in the linear regime in samples of GaP: N with a laser tuned to the bound $A$-exciton line is measured with use of a picosecond time-of-flight technique. The pulse is seen to
Magnetic Response of Metamaterials at 100 Terahertz
TLDR
The measured optical spectra of the nanofabricated gold structures come very close to the theoretical expectations and additional numerical simulations show that the structures exhibit a frequency range with negative permeability for a beam configuration in which the magnetic field couples to the LC resonance.
Superluminal and Slow Light Propagation in a Room-Temperature Solid
TLDR
It is observed that ions in mirror sites are inversely saturable and cause superluminal light propagation, whereas ions in inversion sites experience conventional saturable absorption and produce slow light.
The speed of information in a ‘fast-light’ optical medium
TLDR
It is found that the time to detect information propagating through a fast-light medium is slightly longer than the time required to detect the same information travelling through a vacuum, even though υg in the medium vastly exceeds c.
Cut-wire pairs and plate pairs as magnetic atoms for optical metamaterials.
TLDR
A more pronounced optical response is obtained for arrays of plate pairs, a geometry that also eliminates the undesirable polarization anisotropy of the cut-wire pairs, revealing negative magnetic permeability in the range of telecommunications wavelengths.
Nanofabricated media with negative permeability at visible frequencies
TLDR
A nanofabricated medium consisting of electromagnetically coupled pairs of gold dots with geometry carefully designed at a 10-nm level exhibits a strong magnetic response at visible-light frequencies, including a band with negative µ.
...
1
2
...