Ndembi Ignoumba-Ignoumba, Camille Sonneville, Thomas Kaltsounis, Vishwajeet Maurya, Hala El Rammouz, Mohammed El Amrani, Maroun Dagher, Florian Bartoli, Thibaud Guillemin, Adrien Bidaud, Eric Frayssinet, Farid Medjdoub, Hassan Maher, Jean Marie Bluet, Dominique Planson, Julien Buckley, Yvon Cordier, Matthew Charles, Cyril Buttay

In this work, using micro-Raman spectroscopy mapping, we propose a methodology to separate the stress effect from the n-doping effect on A1LO and E2H GaN phonon modes frequency for low n-doped (<1017 cm−3) GaN layers grown on various substrates (GaN, sapphire, and silicon). This methodology…

Applied Physics Letters, 2026, 128 (12), ⟨10.1063/5.0325369⟩. ⟨hal-05577908⟩

Article dans une revue

Exploiting the insulator–metal transition of VO2 in photocatalytic methane conversion

My Nghe Tran, Duc Manh Nguyen, Matthieu Kpessu Ahounou, Ernesto de la Torre Miranda, Melissa Alzate Banguero, David Troadec, Christophe Coinon, Ahmed Addad, Karima Ben Tayeb, Alexandre Boulle, Pascale Diener, David Mele, Louis Thomas, Xavier Wallart, Lionel Aigouy, Alexandre Zimmers, Aurelian Crunteanu, Vitaly Ordomsky, Bruno Grandidier

Upon illumination, photocatalysts generate charge carriers for redox reactions, but their efficiency is often limited by carrier recombination and poor minority-carrier diffusion, despite many existing junction engineering strategies. Here we exploit the insulator–metal transition in VO2 to produce…

Nature Energy, 2026, ⟨10.1038/s41560-026-02013-w⟩. ⟨hal-05559160⟩

Poster de conférence

IoT-Based Ultrasonic Microsystems for Non-Invasive Vascular Monitoring

K Stekelorom, W.-J Xu, Antoine Collet, D Gangur, S Carlier, I Dayoub, D Remiens, E Dogheche

Cardiovascular diseases remain the leading cause of mortality worldwide, with nearly 20 million deaths annually and 4 million per year in Europe. Conventional vascular Doppler systems are operator-dependent, bulky, and unsuitable for continuous monitoring, limiting integration into connected…

Researcher's Tuesday 2026, Mar 2026, Mons université, Belgium. ⟨hal-05585860⟩

Thèse

Developments for miniature atomic magnetometry, Développements pour magnétométrie atomique miniature

Linda Peroux

Sensitive and accurate magnetic-field measurements are essential in many applications, including geophysical studies, biomagnetic signal detection, navigation, event monitoring, and magnetic anomaly detection. In this context, atomic magnetometers are a particularly promising approach, combining…, La mesure sensible et précise des champs magnétiques est essentielle dans de nombreuses applications, telles que les études géophysiques, la mesure de signaux biomagnétiques, la navigation, la surveillance d’évènements ou la détection d’anomalies magnétiques. Dans ce contexte, les magnétomètres…

Physics [physics]. Centrale Lille Institut, 2026. English. ⟨NNT : ⟩. ⟨tel-05551174⟩

Notice d’encyclopédie ou de dictionnaire

Archives et fonds Carnot

Raffaele Pisano

Sous la direction scientifique du professeur Raffaele Pisano de l’université de Lille, à l’occasion du colloque célébrant le bicentenaire de la publication des Réflexions sur la puissance motrice du feu et sur les machines propres à développer cette puissance (1824–2024), l’équipe de LillOnum a…

Sélection de documents et d’archives originaux relatifs à Sadi Carnot et à son environnement scientifique, 2026. ⟨hal-05550838⟩

Article dans une revue

AlGaN Back-Barrier Integration for Trap Reduction in Buffer-Free GaN HEMTs on SiC

François Grandpierron, Elodie Carneiro, Lyes Ben-Hammou, Anders Lundskog, Jui-Che Chang, Jr-Tai Chen, Farid Medjdoub

This work investigates the impact of incorporating an AlGaN back barrier (BB) in buffer-free AlGaN/GaN high electron mobility transistors (HEMTs) on SiC. Both devices use an AlN nucleation layer (NL) for vertical isolation, while the modified structure introduces an Al0.2Ga0.8N BB beneath the GaN…

APL Electronic Devices, 2026, 2 (1), pp.016129. ⟨10.1063/5.0323419⟩. ⟨hal-05548105⟩