# 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.

## 14 Citations

### Synthetic Axion Response with Spacetime Crystals

- Physics
- 2022

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

- PhysicsAdvanced Photonics
- 2019

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

- Computer Science2020 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)

- Physics2020 14th European Conference on Antennas and Propagation (EuCAP)
- 2020

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

- Physics
- 2021

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

- PhysicsJournal of Physics: Conference Series
- 2021

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

- PhysicsPhysical Review Applied
- 2020

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].

- Physics, Environmental ScienceOptics 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

- PhysicsAdvanced Optical Materials
- 2022

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

- Computer ScienceIEEE Transactions on Antennas and Propagation
- 2021

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.

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