241 citations · 1k across the 33 of their papers we have counts for
35 papers
Optimization of Active Reconfigurable Surfaces for Spatiotemporal MU-MIMO Wave Routing in Disordered Media: Application to the Cocktail-Party Problem
Frederic J. N. Jorgensen, Florent Dorlot, Constant Bourdeloux +4
We design an active reconfigurable intelligent surface (RIS) for acoustic multi-user multiple-input multiple-output (MU-MIMO) communication by solving a large-scale convex optimiza…
Phase retrieval based on intensity-only spatiotemporal wavefront shaping
Luis Alberto Razo-López, Marc Guillon, Fabrice Lemoult +1
We introduce a phase retrieval method based on harmonic field representations generated by intensity-only spatiotemporal modulation. A periodic amplitude angular modulation encodes…
Guided elastic waves for soft elastomer characterization: an alternative to conventional rheometry
Samuel Croquette, Pierre Chantelot, Daniel A. Kiefer +2
Elastic wave propagation is intrinsically sensitive to the mechanical properties of the medium through which it travels. In soft elastomers, this makes guided elastic waves natural…
Guided elastic waves informed material modelling of soft incompressible media
Pierre Chantelot, Samuel Croquette, Fabrice Lemoult
Identifying a universal material constitutive law, that describes the mechanical response of rubber-like solids for all deformation fields and achievable extensions, is an outstand…
Single-Antenna Non-Line-of-Sight Matrix Imaging via Reconfigurable Intelligent Surfaces
Antton Goïcoechea, François Sarrazin, Theodosios Karamanos +3
Modern imaging and sensing in complex environments, ranging from biomedical diagnostics to wireless communication, relies on accurately measuring and then controlling the wave prop…
Wave propagation in a model artery
Pierre Chantelot, Alexandre Delory, Claire Prada +1
Fluid filled pipes are ubiquitous in both man-made constructions and living organisms. In the latter, biological pipes, such as arteries, have unique properties as their walls are…
Elastic wavepackets crossing a space-time interface
Alexandre Delory, Claire Prada, Maxime Lanoy +3
The interaction between waves and evolving media challenges traditional conservation laws. We experimentally investigate the behavior of elastic wave packets crossing a moving inte…
Towards optimal spatiotemporal wavefront shaping for the cocktail party problem with inverse design of an acoustic reconfigurable metasurface in disordered media
Raphael Pestourie, Constant Bourdeloux, Fabrice Lemoult +2
Multiple-user multiple-input multiple-output applications have recently gained a lot of attention. Here, we show an efficient optimization formulation for the design of all the tem…
Supersonic shear wave imaging in stretched soft strips: modeling for quantitative elastography
Alexandre Delory, Daniel A. Kiefer, Claire Prada +1
Objective - Shear wave elastography has enriched ultrasound medical imaging with quantitative measurements of tissue stiffness. However, this method still suffers from some limitat…
Topology Optimization for Microwave Control With Reconfigurable Intelligent Metasurfaces In Complex Media
Theodosios D. Karamanos, Mathias Fink, Fabrice Lemoult
Reconfigurable intelligent metasurfaces have been proposed as an efficient solution for improving wireless telecommunication systems in multiple scattering or reverberating media.…
Viscoelastic dynamics of a soft strip subject to a large deformation
Alexandre Delory, Daniel A. Kiefer, Maxime Lanoy +3
To produce sounds, we adjust the tension of our vocal folds to shape their properties and control the pitch. This efficient mechanism offers inspiration for designing reconfigurabl…
Dynamic structured illumination for confocal microscopy
Guillaume Noetinger, Fabrice Lemoult, Sébastien M. Popoff
Structured illumination enables the tailoring of an imaging device's optical transfer function to enhance resolution. We propose the incorporation of a temporal periodic modulation…
Super-resolved imaging based on spatiotemporal wavefront shaping
Guillaume Noetinger, Samuel Métais, Geoffroy Lerosey +3
A novel approach to improving the performances of confocal scanning imaging is proposed. We experimentally demonstrate its feasibility using acoustic waves. It relies on a new way…
Guided elastic waves in a highly-stretched soft plate
Alexandre Delory, Fabrice Lemoult, Antonin Eddi +1
We study the propagation of guided elastic waves in a highly-stretched Ecoflex\c{opyright} plate, a nearly incompressible elastomer. The plate is subjected to a nearly-uniaxial str…
Multi-path fading and interference mitigation with Reconfigurable Intelligent Surfaces
Jean Baptiste Gros, Geoffroy Lerosey, Fabrice Lemoult +3
We exploit multi-path fading propagation to improve both the signal-to-interference-plus-noise-ratio and the stability of wireless communications within electromagnetic environment…
Three-dimensional acoustic lensing with a bubbly diamond metamaterial
Maxime Lanoy, Fabrice Lemoult, Geoffroy Lerosey +3
A sound wave travelling in water is scattered by a periodic assembly of air bubbles. The local structure matters even in the low frequency regime. If the bubbles are arranged in a…
Cloaking, Trapping and Superlensing of Lamb Waves with Negative Refraction
François Legrand, Benoît Gérardin, François Bruno +4
We report on experimental and numerical implementations of devices based on the negative refraction of elastic guided waves, the so-called Lamb waves. Consisting in plates of varyi…
Asymmetric frequency conversion with acoustic non-Hermitian space-time varying metamaterial
Xinhua Wen, Xinghong Zhu, Alvin Fan +5
Space-time modulated metamaterials support extraordinary rich applications, such as parametric amplification, frequency conversion and non-reciprocal transmission. However, experim…
Dirac cones and chiral selection of elastic waves in a soft strip
Maxime Lanoy, Fabrice Lemoult, Antonin Eddi +1
We study the propagation of in-plane elastic waves in a soft thin strip; a specific geometrical and mechanical hybrid framework which we expect to exhibit Dirac-like cone. We separ…
Structure-Composition Correspondence in Crystalline Metamaterials for Acoustic Valley-Hall Effect and Unidirectional Sound Guiding
Simon Yves, Geoffroy Lerosey. Fabrice Lemoult
Recently, the domain of topological insulators in condensed matter physics has been teeming with intriguing and very exciting discoveries. Notably, the capacity of guiding currents…
Multiple scattering enabled superdirectivity from a subwavelength ensemble of resonators
S. Metais, G. Lerosey, F. Lemoult
An ensemble of resonators arranged on a sub-wavelength scale is usually considered as a bulk effective medium, known as a metamaterial, and can offer unusual macroscopic properties…
Measuring Dirac Cones in a Sub-Wavelength Metamaterial
Simon Yves, Thomas Berthelot, Mathias Fink +2
The exciting discovery of bi-dimensional systems in condensed matter physics has triggered the search of their photonic analogues. In this letter, we describe a general scheme to r…
Left-handed Band in an Electromagnetic Metamaterial Inducedby Sub-wavelength Multiple Scattering
Simon Yves, Thomas Berthelot, Mathias Fink +2
Due to the deep sub-wavelength unit cell in metamaterials, the quasi-static approximation is usually employed to describe the propagation. By making pairs of resonators, we highlig…
Locally Polarized Wave Propagation through Metamaterials' Crystallinity
Simon Yves, Thomas Berthelot, Geoffroy Lerosey +1
Wave propagation control is of fundamental interest in many areas of Physics. It can be achieved with wavelength-scaled photonic crystals, hence avoiding low frequency applications…