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Affichage de 3041 à 3050 sur 16064

Article dans une revue

Heuristically accelerated reinforcement learning for channel assignment in wireless sensor networks

Mohamed Sahraoui, Azeddine Bilami, Abdelmalik Taleb-Ahmed

In wireless sensor networks (WSNs), multi-channel communication represents an attractive field due to its advantage in improving throughput and delivery rate. However, the major challenge that faces WSNs is the energy constraint. To overcome the channel assignment problem in an energy-efficient way...

International Journal of Sensor Networks, 2021, 37 (3), pp.159. ⟨10.1504/IJSNET.2021.118877⟩. ⟨hal-03501786⟩

Communication dans un congrès

Cavity flow controlled with an array of magneto-mechanical micro-valves

Thomas Arnoult, Cécile Ghouila-Houri, Colin Leclercq, Aurélien Mazzamurro, Romain Viard, Eric Garnier, Denis Sipp, Alain Merlen, Abdelkrim Talbi, Philippe Pernod

This paper presents and discusses micro-magneto-mechanical valves designed for cavity flow control. Realized using microfabrication techniques and rapid prototyping, the micro-valves exhibit a small footprint and adequate performances for low-speed cavity flow control. An array of 15 micro-valves...

2021 IEEE Sensors, Oct 2021, Sydney, Australia. pp.1-4, ⟨10.1109/SENSORS47087.2021.9639871⟩. ⟨hal-03501259⟩

Article dans une revue

New barrier layer design for the fabrication of gallium nitride-metal-insulator-semiconductor-high electron mobility transistor normally-off transistor

Flavien Cozette, Bilal Hassan, Christophe Rodriguez, Eric Frayssinet, Rémi Comyn, François Lecourt, Nicolas Defrance, Nathalie Labat, François Boone, Ali Soltani, Abdelatif Jaouad, Yvon Cordier, Hassan Maher

This paper reports on the fabrication of an enhancement-mode AlGaN/GaN metal-insulator-semiconductor-high electron mobility transistor with a new barrier epi-layer design based on double Al 0.2 Ga 0.8 N barrier layers separated by a thin GaN layer. Normally-off transistors are achieved with good...

Semiconductor Science and Technology, 2021, 36 (3), pp.034002. ⟨10.1088/1361-6641/abd489⟩. ⟨hal-03341284⟩

Chapitre d'ouvrage

13 - Fibonacci Loop Structures: Bandgaps, Power Law, Scaling Law, Confined and Surface Modes

El Houssaine El Boudouti, Bahram Djafari-Rouhani, Abdellatif Akjouj, L. Dobrzynski

We study theoretically and experimentally the existence and behavior of scaling law, power law, as well as confined and surface modes in one-dimensional (1D) quasiperiodic photonic bandgap structures. These structures are made of segments and loops arranged according to a Fibonacci sequence. We...

Photonics, Part 2: Photonic Circuits, Elsevier, pp.333-371, 2021, 978-0-12-819388-4. ⟨10.1016/B978-0-12-819388-4.00023-X⟩. ⟨hal-03359903⟩

Chapitre d'ouvrage

19 - Optical Waves in Finite Layered Photonic Crystals

Abdellatif Akjouj, El Houssaine El Boudouti, L. Dobrzynski, Bahram Djafari-Rouhani

We investigated the propagation of electromagnetic waves in a finite photonic crystal bounded by a substrate and vacuum, and separated from them by a buffer layer and a cap layer. In this realistic geometry, we show the existence of different kinds of localized and resonant modes whose behaviors...

Photonics, Part Three: Photonic Materials, Elsevier, pp.529-568, 2021, 978-0-12-819388-4. ⟨10.1016/B978-0-12-819388-4.00030-7⟩. ⟨hal-03360008⟩

Article dans une revue

H-Band Substrate-Integrated Discrete-Lens Antenna for High Data Rate Communication Systems

Kossaila Medrar, Loïc Marnat, Laurent Dussopt, Cybelle Belem-Gonçalves, Guillaume Ducournau, Cyril Luxey, Frédéric Gianesello

A substrate-integrated discrete-lens antenna manufactured in standard printed-circuit-board (PCB) technology is demonstrated in H-band (225-325 GHz). The arrays composed of phase-shifting unit cells and a waveguide-fed planar focal source are designed on a single PCB stack with five metal layers...

IEEE Transactions on Antennas and Propagation, 2021, 69 (7), pp.3677-3688. ⟨10.1109/TAP.2020.3044382⟩. ⟨hal-03546303⟩

Chapitre d'ouvrage

11 - Photonic Monomode Circuits: Comb Structures

Abdellatif Akjouj, El Houssaine El Boudouti, L. Dobrzynski, Bahram Djafari-Rouhani

Photon circuits are light conducting networks formed by joining several dielectric waveguide channels for the transmission of light. Their production utilizes the most advanced surface technologies and represents one of the most important challenges for the next decade. These circuits are usually...

Photonics, Part 2: Photonic Circuits, Elsevier, pp.219-285, 2021, 978-0-12-819388-4. ⟨10.1016/B978-0-12-819388-4.00021-6⟩. ⟨hal-03359900⟩

Chapitre d'ouvrage

9 - Electromagnetic Induced Transparency, Induced Absorption, and Fano Resonances in Photonic Circuits

El Houssaine El Boudouti, Abdellatif Akjouj, Bahram Djafari-Rouhani, Abdelkrim Talbi, L. Dobrzynski

In this chapter, a simple photonic device consisting of two dangling side resonators grafted at two sites (U-shape) or at the same site (cross-shape) along a waveguide is designed in order to obtain sharp resonant states inside the transmission gaps without introducing any defects in the structure...

Photonics, Part 2: Photonic Circuits, Elsevier, pp.155-191, 2021, 978-0-12-819388-4. ⟨10.1016/B978-0-12-819388-4.00019-8⟩. ⟨hal-03359904⟩

Article dans une revue

Optimization of Reactive-Ion Etching (RIE) parameters to maximize the lateral etch rate of silicon using SF6/N2 gas mixture: An alternative to etching Si in MEMS with Au components

Munique Kazar Mendes, Cécile Ghouila-Houri, Serria Hammami, Thomas Arnoult, Philippe Pernod, Abdelkrim Talbi

In this work, the effects of the N2 addition to the SF6 plasma used in the isotropic silicon etching of Microelectromechanical systems (MEMS) with Au components are investigated. A four-variables Doehlert design was implemented for optimizing the etching parameters (power, pressure, gas flow rate,...

Materials Letters, 2021, 285, pp.129058. ⟨10.1016/j.matlet.2020.129058⟩. ⟨hal-03330078⟩

Article dans une revue

Near-field scanning millimeter-wave microscope operating inside a scanning electron microscope: towards quantitative electrical nanocharacterization

Petr Polovodov, Didier Theron, Clément Lenoir, D. Deresmes, Sophie Eliet, Christophe Boyaval, Gilles Dambrine, Kamel Haddadi

The main objectives of this work are the development of fundamental extensions to the existing scanning microwave microscopy (SMM) technology to achieve quantitative complex impedance measurements at the nanoscale. We developed an SMM operating up to 67 GHz inside a scanning electron microscope...

Applied Sciences, 2021, 11 (6), pp.2788. ⟨10.3390/app11062788⟩. ⟨hal-03320954v2⟩