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Affichage de 2091 à 2100 sur 16175

Communication dans un congrès

Phonon-Plasmon coupling in pillared phononic crystals mediated by surface acoustic waves

A. Noual, Rock Akiki, Gaëtan Lévêque, Yan Pennec, El Houssaine El Boudouti, Bahram Djafari-Rouhani

We study theoretically the phonon-plasmon interaction in a multilayered structure supporting metallic nano-pillars or ridges. The acoustic vibrations of the pillars, excited by means of an incident surface acoustic wave (Sezawa wave), interact with localized plasmons of metal-insulator-metal type....

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369307⟩

Communication dans un congrès

Elastic wave propagation along a 1D chain of pillars

Rock Akiki, Laurent Carpentier, Adnane Noual, Bernard Bonello, Bahram Djafari-Rouhani, Yan Pennec

We theoretically investigate with the help of the finite element method the interaction between aluminum pillars erected on top of a silicon substrate in the low frequency range. We investigated the resonant modes of a finite linear chain of N pillars and demonstrate the propagation along the chain...

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369107⟩

Communication dans un congrès

Theoretical Polarimetric Channel Characterization of Road Tunnels in Presence of Vehicles at 5.9 GHz

Jose-Maria Molina-Garcia-Pardo, Esteban Egea-Lopez, Martine Lienard, Pierre Degauque

Vehicular communication is a hot topic for developing solutions for automatic guidance, safety-related problems, and end-user applications. The dedicated frequency band in Europe is around 5.9 GHz. Characterization of the communication channel is thus deeply studied especially for the urban and...

2022 26th International Conference on Circuits, Systems, Communications and Computers (CSCC), Jul 2022, Crete, Greece. pp.280-285, ⟨10.1109/CSCC55931.2022.00054⟩. ⟨hal-03997408⟩

Communication dans un congrès

Triangular resonators in topological valley photonic crystals

Gaëtan Lévêque, A. Martínez, Yan Pennec

In that work, we investigate numerically photonic topological insulators based on the valley Hall effect. Linear waveguides are coupled to triangular cavities, and a semi-analytical model is used to evidence the relation between a weak back-scattering along light propagation and the shape of the...

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369166⟩

Communication dans un congrès

Biosensor based on Phononic Crystals Supporting Bound States in the Continuum and Fano resonances

I. Quotane, M. Amrani, C. Ghouila-Houri, E. El Boudouti, L. Krutyanskiy, Bogdan Piwakowski, Philippe Pernod, Abdelkrim Talbi, Bahram Djafari-Rouhani

We study a one-dimensional phononic crystal (1D-PC) that provides a new biosensor platform based on bound states in the continuum (BICs) and Fano resonances. The structure consists of a triple solid-liquid-solid layer immersed in water, where epoxy is used as the solid layers and a mixture of water...

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369163⟩

Communication dans un congrès

Spectral flow of a localized elastic mode

M. Miniaci, F. Allein, R. K Pal

The introduction of structural defects in otherwise periodic media is well known to grant exceptional space control and localization of waves in various physical fields, including elasticity. We theoretically predict and experimentally demonstrate the spectral flow of a localized mode across a bulk...

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369179⟩

Communication dans un congrès

Acoustic waves focusing with elliptic pillars type metasurface

Laurent Carpentier, Yan Pennec, Bahram Djafari-Rouhani

We numerically investigate the focusing properties of an acoustic metasurface consisting of a line of pillars of elliptic shape on a thin plate. We report on the influence of the ellipticity parameter on both monopolar compressional and dipolar bending modes of the pillars. We show that a line of...

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369116⟩

Communication dans un congrès

Experimental demonstration of nonreciprocal propagation in a piezoelectric phononic crystal with spatio-temporal modulation of electrical conditions

Sarah Tessier, Charles Croënne, Florian Allein, Jerome O. Vasseur, Bertrand Dubus

This work concerns the experimental study of the propagation of elastic waves in a piezoelectric phononic crystal made of several identical piezoelectric elements separated by thin electrodes. We analyze the effect of spatio-temporal modulation of electrical conditions on wave propagation. The...

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369232⟩

Communication dans un congrès

Asymmetric Elastic Wave Propagation in Spatiotemporally Modulated Nonlinear Granular Phononic Crystal

Florian Allein, Georgios Theocharis, Nicholas Boechler

We study the propagation of transverse-rotational waves in a granular crystal in which the shear stiffnesses are spatiotemporally modulated by a longitudinal propagating wave. Asymmetric wave propagation is investigated as well as one-way conversion and transmission. The combination of different...

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369210⟩

Communication dans un congrès

Manipulation of sonic waves by a quadruple set of Helmholtz resonators

R. Sabat, Yan Pennec, Gaëtan Lévêque, E. Cochin, D. Torrent, Bahram Djafari-Rouhani

This paper examines the coupling effect between Helmholtz resonators (HRs) on mitigating low-frequency sound, using the finite element model. Previously, we highlighted the physical mechanism behind double coupled HRs, generating two resonance modes, symmetric and antisymmetric. Such coupling...

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369145⟩