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Affichage de 2871 à 2880 sur 16556

  • Article dans une revue

A perspective on elastic metastructures for energy harvesting

Zhihui Wen, Wan Wang, Abdelkrim Khelif, Bahram Djafari-Rouhani, Yabin Jin

Rapid advances have been made in the properties of metastructures, including phononic crystals, metamaterials, and metasurfaces, with respect to their robustness, high power density, and broadband behavior. This presents unique advantages for energy harvesting devices to meet the demands for...

Applied Physics Letters, 2022, 120 (2), pp.020501. ⟨10.1063/5.0078740⟩. ⟨hal-03596148⟩

  • Article dans une revue

Strong and weak polarization-dependent interactions in connected and disconnected plasmonic nanostructures

Damien Eschimèse, François Vaurette, Céline Ha, Steve Arscott, Thierry Mélin, Gaëtan Lévêque

We explore numerically and experimentally the formation of hybridized modes between a bright mode displayed by a gold nanodisc and either dark or bright modes of a nanorod – both elements being either separated by a nanometer-size gap (disconnected system) or relied on a metal junction (connected...

Nanoscale Advances, 2022, 4, pp.1173-1181. ⟨10.1039/D1NA00620G⟩. ⟨hal-03561511⟩

  • Article dans une revue

Stochastic Geometry-based Analysis of the Impact of Underlying Uncorrelated IoT Networks on LoRa Coverage

Romain Chevillon, Guillaume Andrieux, Laurent Clavier, Jean-François Diouris

IoT networks are more and more present nowadays. Some IoT protocols share the samebandwidth leading to interference on neighboring networks and decrease of overall coverage. To contributeto this problem, an analytical study of the coverage of a LoRa network with underlying uncoordinatedIoT networks...

IEEE Access, 2022, 10, pp.8790-8803. ⟨10.1109/ACCESS.2022.3141540⟩. ⟨hal-03520374⟩

  • Communication dans un congrès

Rayleigh Modes Generated by Laser-Ultrasonics at the Film-Substrate Interface for the Study of Adhesion

Martin Robin, Meriem Chrifi Alaoui, Frédéric Jenot, Mohammadi Ouaftouh, Marc Duquennoy

Adhesion testing of film-on-substrate structures by surface acoustic waves is a complex issue. Indeed, the fluctuations of some parameters like the film thickness can lead to misinterpretation of the experimental results. Additionally, in laser-ultrasonics, the positions of the generation and...

16ème Congrès Français d'Acoustique, CFA 2022, Société Française d'Acoustique; Laboratoire de Mécanique et d'Acoustique, Apr 2022, Marseille, France. ⟨hal-03688151v2⟩

  • Article dans une revue

State of the Art of Chemosensors in a Biomedical Context

Erich Kny, Ciril Reiner-Rozman, Jakub Dostalek, Achim-Walter Hassel, Christa Nöhammer, Florian Pfaffeneder-Mantai, Sabine Szunerits, Viktoria Weber, Wolfgang Knoll, Christoph Kleber

Healthcare is undergoing large transformations, and it is imperative to leverage new technologies to support the advent of personalized medicine and disease prevention. It is now well accepted that the levels of certain biological molecules found in blood and other bodily fluids, as well as in...

Chemosensors, 2022, 10 (6), pp.199. ⟨10.3390/chemosensors10060199⟩. ⟨hal-03681612⟩

  • Article dans une revue

High gain/bandwidth off-chip antenna loaded with metamaterial unit-cell impedance matching circuit for sub-terahertz near-field electronic systems

Mohammad Alibakhshikenari, Bal Virdee, Dion Mariyanayagam, Valeria Vadalà, Mohammad Naser-Moghadasi, Chan See, Iyad Dayoub, Sonia Aïssa, Patrizia Livreri, Shah Nawaz Burokur, Anna Pietrenko-Dabrowska, Francisco Falcone, Slawomir Koziel, Ernesto Limiti

An innovative off-chip antenna (OCA) is presented that exhibits high gain and efficiency performance at the terahertz (THz) band and has a wide operational bandwidth. The proposed OCA is implemented on stacked silicon layers and consists of an open circuit meandering line. It is shown that by...

Scientific Reports, 2022, 12 (1), pp.17893. ⟨10.1038/s41598-022-22828-3⟩. ⟨hal-03839058⟩

  • Article dans une revue

In-plane InGaAs/Ga(As)Sb nanowire based tunnel junctions grown by selective area molecular beam epitaxy

Alexandre Bucamp, Christophe Coinon, Sylvie Lepilliet, David Troadec, Gilles Patriarche, M Diallo, Vanessa Avramovic, Kamel Haddadi, X. Wallart, L. Desplanque

In-plane InGaAs/Ga(As)Sb heterojunction tunnel diodes are fabricated by selective area molecular beam epitaxy with two different architectures: either radial InGaAs core/Ga(As)Sb shell nanowires or axial InGaAs/GaSb heterojunctions. In the former case, we unveil the impact of strain relaxation and...

Nanotechnology, 2022, 33 (14), pp.145201. ⟨10.1088/1361-6528/ac45c5⟩. ⟨hal-03547003⟩

  • Communication dans un congrès

Sub-nanosecond pulse technology applied to millimetre wave systems for TDoA-based geolocalization

Christophe Loyez, Michael Bocquet, Nathalie Rolland, Kamel Haddadi

This study deals with a geolocation system that uses sub-nanosecond pulsed radio signals. Based on Time Difference of Arrival (TDoA), it allows the localization of 60-GHz transmitters in an indoor environment with an accuracy compatible with the requirements of the next generation of communicating...

2022 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNeT), Jan 2022, Las Vegas, United States. pp.50-53, ⟨10.1109/WiSNet53095.2022.9721359⟩. ⟨hal-03600035⟩

  • Article dans une revue

Ultrasonic investigation of the effect of compressive strains on 3D periodic bi-material structures

Lynda Chehami, Jingfei Liu, Pascal Pomarède, Paul Lohmuller, Boris Pittrowski, Fodil Meraghni, Nico Declercq

Due to the specific elastic properties such as high stiffness to mass ratio, regular microstructure materials are widely used in the industry. The need for nondestructive evaluation is ubiquitous to ensure material quality. As an effective nondestructive testing method, ultrasound has great...

Acta Acustica, 2022, 6, pp.26. ⟨10.1051/aacus/2022023⟩. ⟨hal-03748457⟩

  • Communication dans un congrès

Mise en œuvre de capteurs RF-MEMS acoustiques pour l’industrie 4.0

Yannick Dusch, Cécile Ghouila-Houri, Aurélien Mazzamurro, Ghizlane Boussatour, Hatem Dahmani, Olivier Bou Matar, Vincent Maurice, Philippe Pernod, Abdelkrim Talbi

Cette étude propose la conception complète d’un système de suivi à distance des sollicitations mécaniques dans les machines électriquesafin de répondre aux problématiques de l’industrie 4.0 et de la maintenance prédictive. Elle s’appuie sur la conception, la fabrication et la caractérisation de...

16emes journées pédagogiques du CNFM, JPCNFM’2021, CNFM, Dec 2021, Saint-Malo, France. 6 p., J3eA Hors-série 1 - Actes JPCNFM’2021, Volume 21 (2022), ⟨10.1051/j3ea/20221019⟩. ⟨hal-03464507⟩