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Affichage de 601 à 610 sur 16231

Article dans une revue

Terahertz time-domain ellipsometry with spintronic emitters: Pauli coefficients as a superior alternative to Jones and Mueller matrices

Pierre Koleják, Jiaming Liu, Robin Silber, Martin Mičica, Ondřej Ballada, Čestmír Barta, Romain Lebrun, Nicolas Tiercelin, Mathias Vanwolleghem, Kamil Postava

We introduce terahertz complete time-domain spectroscopic ellipsometry (THz-cTDSE), extending traditional ellipsometry by determining full Jones and Mueller matrices for in-depth material characterization. This marks the first application of spintronic terahertz emitters in ellipsometry, achieving…

IEEE Transactions on Terahertz Science and Technology, 2025, pp.1-17. ⟨10.1109/TTHZ.2025.3559074⟩. ⟨hal-05065593⟩

Pré-publication, Document de travail

Strain energy harvesting performances of piezoelectric composite transducers in rolling tires: a numerical study

Arthur Givois, Florian Allein, Hung Le Khanh, Hervé Dietsch, Charles Croënne, Bertrand Dubus

<div><p>Tire-pavement contact is responsible for mechanical strain energy which can be used to power autonomous smart devices in the context of automotive industry. Power harvesting capabilities of piezoelectric composites included in the host structure are numerically evaluated from…

2025. ⟨hal-05361358⟩

Article dans une revue

Bi‐LORA : A Vision‐Language Approach for Synthetic Image Detection

Mamadou Keita, Wassim Hamidouche, Hessen Bougueffa Eutamene, Abdelmalik Taleb-Ahmed, David Camacho, Abdenour Hadid

Advancements in deep image synthesis techniques, such as generative adversarial networks (GANs) and diffusion models (DMs), have ushered in an era of generating highly realistic images. While this technological progress has captured significant interest, it has also raised concerns about the high…

Expert Systems, 2025, 42 (2), ⟨10.1111/exsy.13829⟩. ⟨hal-04881973⟩

Article dans une revue

A Theoretical Analysis of the Frequency Response in p-i-n Photodiodes that Use InGaAs/InP Materials

Nesrine Bakalem, Abdelkader Aissat, Samuel Dupont, Faouzi Saidi, Mohamed Houcine Dhaou, Jean Pierre Vilcot

This investigation is centered on the analysis of frequency response characteristics of a p-i-n photodiode using InxGa$_{1-x}$As/InP. The InGaAs/InP can be developed under three conditions: compression, tensile strain, and lattice matching. Initially, we performed calculations on strain, bandgap…

Micromachines, 2025, 16 (7), pp.764. ⟨10.3390/mi16070764⟩. ⟨hal-05170116⟩

Article dans une revue

Nanoscale Calibration Standards for On-Wafer S-Parameters measurements up to 110 GHz

Daouda Seck, Djamel Allal, Florent Marlec, Clément Lenoir, Mohamed Sebbache, Kamel Haddadi

<div xmlns="http://www.tei-c.org/ns/1.0"><p>We report the first experimental results on the design and fabrication of nanoscale on-wafer calibration standards operating up to 110 GHz. The propagation constant and effective permittivity of coplanar waveguide (CPW) transmission…

EPJ Web of Conferences, 2025, 22nd International Metrology Congress (CIM2025), 323, ⟨10.1051/epjconf/202532312003⟩. ⟨hal-05065878⟩

Article dans une revue

Tunable Topological Directional Supercoupler and Applications in THz On‐Chip Communication

Ridong Jia, Wenhao Wang, Yi Ji Tan, Thomas Caiwei Tan, Manoj Gupta, Zhonghua Gu, Prakash Pitchappa, Pascal Szriftgiser, Guillaume Ducournau, Ranjan Singh

A photonic directional coupler plays a critical role in photonic integrated circuits and communication technologies, facilitating precise power distribution for multi-channel data routing and transmission. However, conventional directional couplers face limitations in further optimizing the…

Laser and Photonics Reviews, In press, ⟨10.1002/lpor.202501209⟩. ⟨hal-05308730⟩

Article dans une revue

An Interlaboratory Comparison of On-Wafer S-Parameter Measurements up to 1.1 THz

Faisal Mubarak, Gia Ngoc Phung, Uwe Arz, Kamel Haddadi, Isabelle Roch-Jeune, Guillaume Ducournau, Thomas Flisgen, Ralf Doerner, Djamel Allal, Divya Jayasankar, Jan Stake, Robin Schmidt, Gavin Fisher, Nick Ridler, Xiaobang Shang

This paper reports on an interlaboratory measurement comparison involving on-wafer S-parameter measurements from 10 GHz to 1.1 THz. Seven laboratories are involved, and each participant has measured an individual reference substrate fabricated from a high-resistivity silicon wafer in the same batch…

IEEE Transactions on Terahertz Science and Technology, 2025, pp.1-16. ⟨10.1109/TTHZ.2025.3537461⟩. ⟨hal-04926307⟩

Chapitre d'ouvrage

Modeling Mechanical Micro-instabilities in Biophysics and Materials Science

Andrea Cannizzo, Manon Benedito, Fabio Manca, Stefano Giordano

From biophysics to materials science, mechanical micro-instabilities play a central role in a multitude of materials and structures (adhesion, fracture, friction, phase transformations and so on). Although these systems are very different in length-scale, time-scale and morphology, they are all…

Raffaele Pisano. Nanoscience & Nanotechnologies. Critical Problems, Science in Society, Historical Perspectives, Springer Cham, pp.103-180, 2025, Nanotechnology in the Life Sciences, 978-3-031-85121-6. ⟨10.1007/978-3-031-85122-3_3⟩. ⟨hal-05321990⟩

Article dans une revue

Deep Reinforcement Learning for Joint Time and Power Management in SWIPT-EH CIoT

Nadia Abdolkhani, Nada Abdel Khalek, Walaa Hamouda, Iyad Dayoub

This letter presents a novel deep reinforcement learning (DRL) approach for joint time allocation and power control in a cognitive Internet of Things (CIoT) system with simultaneous wireless information and power transfer (SWIPT). The CIoT transmitter autonomously manages energy harvesting (EH) and…

IEEE Communications Letters, 2025, 29 (4), pp.660-664. ⟨10.1109/LCOMM.2025.3536182⟩. ⟨hal-05066855⟩

Article dans une revue

Misbehavior Detection in Connected Vehicle: Pre-Bayesian Majority Game Framework

Adil Attiaoui, Mouna Elmachkour, Abdellatif Kobbane, Marwane Ayaida

<div><p>Ephemeral networks, such as vehicular ad hoc networks, face significant security challenges due to their transient nature and susceptibility to malicious nodes. Traditional trust mechanisms often struggle with dynamic topologies and short-lived interactions, particularly when…

Proceedings of the 11th International Conference on Vehicle Technology and Intelligent Transport Systems, 2025, 11th International Conference on Vehicle Technology and Intelligent Transport Systems, pp.529 - 536. ⟨10.5220/0013359100003941⟩. ⟨hal-05065858⟩