| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kadic, Muamer
STMicroelectronics (United Kingdom)
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2024Anomalous frozen evanescent phonons
- 2023Observation of Chirality‐Induced Roton‐Like Dispersion in a 3D Micropolar Elastic Metamaterialcitations
- 2023Tetramode Metamaterials as Phonon Polarizerscitations
- 2023Tetramode Metamaterials as Phonon Polarizerscitations
- 2023Dispersion Engineering by Hybridizing the Back‐Folded Soft Mode of Monomode Elastic Metamaterials with Stiff Acoustic Modes
- 2023Parrot Beak‐Inspired Metamaterials with Friction and Interlocking Mechanisms 3D/4D Printed in Micro and Macro Scales for Supreme Energy Absorption/Dissipationcitations
- 2023Parrot Beak-Inspired Metamaterials with Friction and Interlocking Mechanisms 3D/4D Printed in Micro and Macro Scales for Supreme Energy Absorption/Dissipationcitations
- 2022Brillouin Light Scattering Characterisation of Gray Tone 3D Printed Isotropic Materialscitations
- 2022Closed tubular mechanical metamaterial as lightweight load-bearing structure and energy absorbercitations
- 2022Mapping of Elastic Properties of Twisting Metamaterials onto Micropolar Continuum using Static Calculations
- 2021Acoustic topological circuitry in square and rectangular phononic crystals
- 2021Cubic metamaterial crystal supporting broadband isotropic chiral phonons
- 2021Effective anisotropy of periodic acoustic and elastic composites
- 2021Three-dimensional phononic crystal with ultra-wide bandgap at megahertz frequenciescitations
- 2021Three-dimensional phononic crystal with ultra-wide bandgap for ultrasonics applications
- 2020Isotropic Chiral Acoustic Phonons in 3D Quasicrystalline Metamaterials
- 2020Acoustic topological circuitry in square and rectangular phononic crystals
- 2020Optimal isotropic, reusable truss lattice material with near-zero Poisson’s ratiocitations
- 2019Ultrasound experiments on acoustical activity in chiral mechanical metamaterialscitations
- 2018Roadmap on transformation opticscitations
- 2017Experimental Evidence for Sign Reversal of the Hall Coefficient in Three-Dimensional Metamaterialscitations
- 2017Experiments on the Parallel Hall Effect in Three-Dimensional Metamaterials
- 2017Three-dimensional mechanical metamaterials with a twist
- 2016Optically assisted trapping with high-permittivity dielectric rings: Towards optical aerosol filtration
Places of action
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article
Observation of Chirality‐Induced Roton‐Like Dispersion in a 3D Micropolar Elastic Metamaterial
Abstract
A theoretical paper based on chiral micropolar effective‐medium theory suggested the possibility of unusual roton‐like acoustical‐phonon dispersion relations in 3D elastic materials. Here, as a first novelty, the corresponding inverse problem is solved, that is, a specific 3D chiral elastic metamaterial structure is designed, the behavior of which follows this effective‐medium description. The metamaterial structure is based on a simple‐cubic lattice of cubes, each of which not only has three translational but also three rotational degrees of freedom. The additional rotational degrees of freedom are crucial within micropolar elasticity. The cubes and their degrees of freedom are coupled by a chiral network of slender rods. As a second novelty, this complex metamaterial is manufactured in polymer form by 3D laser printing and its behavior is characterized experimentally by phonon‐band‐structure measurements. The results of these measurements, microstructure finite‐element calculations, and solutions of micropolar effective‐medium theory are in good agreement. The roton‐like dispersion behavior of the lowest phonon branch results from two aspects. First, chirality splits the transverse acoustical branches as well as the transverse optical branches. Second, chirality leads to an ultrastrong coupling and hybridization of chiral acoustical and optical phonons at finite wavevectors.