• Corpus ID: 143422492

Spacetime Metamaterials

@article{Caloz2019SpacetimeM,
  title={Spacetime Metamaterials},
  author={Christophe Caloz and Zo'e-Lise Deck-L'eger},
  journal={arXiv: Optics},
  year={2019}
}
This paper presents the authors' vision of the emerging field of spacetime metamaterials in a cohesive and pedagogical perspective. For this purpose, it systematically builds up the physics, modeling and applications of these media upon the foundation of their pure-space and pure-time counterparts. 

Synthetic Axion Response with Spacetime Crystals

Here, we show that spacetime modulations provide an exciting route to realize complex nonreciprocal couplings, and in particular the elusive axion response. We develop an analytical formalism to

Uniform-velocity spacetime crystals

Abstract. We perform a comprehensive analysis of uniform-velocity bilayer spacetime crystals, combining concepts of conventional photonic crystals and special relativity. Given that a spacetime

Recent Advances in Space-Time-Coding Digital Metasurfaces

  • L. ZhangX. Q. Chen V. Galdi
  • Computer Science
    2020 Fourteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials)
  • 2020
We provide a compact summary of our recent results and ongoing research on digital metasurfaces based on spatio-temporal coding. Examples of field manipulations include harmonic beam steering and/or

Metasurface Modeling of Periodic Diffraction Gratings based on Generalized Sheet Transition Conditions (GSTCs)

Space-modulated diffraction gratings are modelled and analyzed using a zero thickness metasurface grating approach, and demonstrated using numerical examples. The constitutive parameters of the

Spatiotemporal isotropic-to-anisotropic meta-atoms

Metamaterials and metasurfaces are designed by spatially arranging (periodically or non-periodically) subwavelength geometries, allowing a tailored manipulation of the electromagnetic response of

Temporal transition in parallel-plate waveguides: analysis of scattering and propagation at the temporal interface

In this contribution, we present the analysis and numerical verification of the scattering phenomenon from a temporal interface in a parallel-plate waveguide realized by suddenly modifying the

Space-Time-Modulated Metasurfaces with Spatial Discretization: Free-Space N -Path Systems

This work theoretically and experimentally studies metasurfaces with spatially-discrete, traveling-wave modulation (SD-TWM). A representative metasurface is considered consisting of columns of

Photon number conservation in time dependent systems [Invited].

  • J. Pendry
  • Physics, Environmental Science
    Optics express
  • 2023
Time dependent systems in general do not conserve photons nor do they conserve energy. However when parity-time symmetry holds Maxwell's equations can sometimes both conserve photon number and

Neural Network Design of Multilayer Metamaterial for Temporal Differentiation

This work proposes, design and study multilayer MTMs with the ability to calculate the derivative of incident modulated temporal signals, as an example of a significant computing process for signal processing.

Spread-Spectrum Selective Camouflaging Based on Time-Modulated Metasurface

The object covered by the metasurface is hence perfectly camouflaged to a foe radar and can be detected by a friend radar possessing the spread-spectrum demodulation key corresponding to the metAsurface modulation, and this detection is robust to interfering signals.

References

SHOWING 1-10 OF 129 REFERENCES

Metamaterials add an extra dimension.

  • G. Shvets
  • Materials Science, Physics
    Nature materials
  • 2008
In a major departure from their humble origins as ultrathin monolayers, optical metamaterials have now advanced to three-dimensional bulk media exhibiting both electric and magnetic activity.

A spacetime cloak, or a history editor

An author was omitted from the author list in reference [7]. The correct reference is: McCall M W and Censor D 2007 Relativity and mathematical tools: waves moving media Am. J. Phys. 75 1134--40.

Time reversal and holography with spacetime transformations

Using a water bath subject to a sudden vertical jolt — representing a change in the effective gravity — researchers demonstrate the concept of a ‘time mirror’, where time-reversed waves return to

Uniform-velocity spacetime crystals

Abstract. We perform a comprehensive analysis of uniform-velocity bilayer spacetime crystals, combining concepts of conventional photonic crystals and special relativity. Given that a spacetime

Scattering at Interluminal Interface

Interest for spacetime structures has recently been revived, following developments in metamaterials and ultrafast optics. Such structures essentially consist of successions of space-time interfaces

Boundary conditions of the electromagnetic field

The classical boundary conditions describing the discontinuities of the electromagnetic field across a surface supporting ordinary surface charges and currents are discussed in the case where

Theorems for bianisotropic media

A number of classical theorems of electromagnetism are extended to bianisotropic media. A notation that simplifies the analysis when dealing with such media is employed throughout.

Classical time crystals.

This work considers the possibility that classical dynamical systems display motion in their lowest-energy state, forming a time analogue of crystalline spatial order, and exhibits models of that kind, including a model with traveling density waves.

Electromagnetic Chirality.

This paper presents a first-principle and global perspective of electromagnetic chirality. It follows for this purpose a bottom-up construction, from the description of chiral particles or

Optical metamaterials: Invisibility cup

Cloaking devices for visible light come a step closer to reality by combining the modern form of a Roman technology with ideas from ancient Greece.
...