Publications

• Article dans une revue

Nonlinear modeling of AlN/GaN HEMT accounting for self-biasing effect during RF step stress: analysis and hard-SOA

N. Said, D. Saugnon, K. Harrouche, F Medjdoub, N. Labat, N. Malbert, Jean-Guy Tartarin

In this study, we investigate the non-linear (NL) behavior of AlN/GaN HEMT technologies under gain compression when submitted to 10 GHz single-tone RF-step stress, which is crucial for millimetre-wave power application robustness. We evaluate AlN/GaN transistors, targeting high-power amplifiers…

Microelectronics Reliability, 2025, 169, pp.115742. ⟨10.1016/j.microrel.2025.115742⟩. ⟨hal-05065556⟩

• Article dans une revue

Physical and electrical characterizations of low n-doped MOCVD GaN-on-sapphire layers for power electronics applications

Ndembi Ignoumba-Ignoumba, Camille Sonneville, Adrien Bidaud, Pierre Brosselard, Eric Frayssinet, Florian Bartoli, Yvon Cordier, Farid Medjdoub, Dominique Planson, Cyril Buttay

This work presents physical and electrical characterizations of low n-doped MOCVD GaN-on-sapphire layers and associated quasi-vertical Schottky Barrier Diodes (SBDs). Samples GaN drift layers have globally a similar quality as examined by XRD, AFM Raman spectroscopy, C-V measurements and I-V…

Power Electronic Devices and Components, 2025, 11, pp.100100. ⟨10.1016/j.pedc.2025.100100⟩. ⟨hal-05099383⟩

• Article dans une revue

Thermoelastic properties of polycrystalline strontium titanium silicate Sr₂TiSi₂O₈ synthesized via the reactive sintering method

Oussama Zwein, Maurice Gonon, Sandra Abdelouhab, Isabella Mastroianni, Marc Duquennoy

The aim of the work presented in this paper is to investigate the thermoelastic properties of polycrystalline Sr-fresnoite Sr2TiSi2O8 (STS). On that purpose, Sr2TiSi2O8 samples were synthesized by solid state reactive sintering from SrCO3, TiO2 and SiO2 powders. The thermal expansion behaviour of…

Journal of the European Ceramic Society, 2025, 45 (6), pp.117224. ⟨10.1016/j.jeurceramsoc.2025.117224⟩. ⟨hal-04923467⟩

• Communication dans un congrès

Conducting Polymers-Based Microsystems: Mechanical Design Simulation and Fabrication

Sofiane Ghenna, Thanh-Hang Tran, Sébastien Grondel, Eric Cattan

Conducting polymer-based microsystems are receiving increasing attention due to their unique electromechanical properties and strong potential for innovative applications. This work presents an integrated approach that spans the fundamental principles of conducting polymer actuators, along with…

Seminar of Flexible Microstructure, Customized Materials in Biomedical Engineering and Technologies 26-27 May 2025 - Poznan, Poznan University of Technology, May 2025, Pozan, Poland. ⟨hal-05085643⟩

• Article dans une revue

Entropic forces in rotaxane-based daisy chains: Toward tunable nanomechanical systems

Gaétan Sanchez, Claudia Binetti, Giuseppe Florio, Nicola M Pugno, Giuseppe Puglisi, Stefano Giordano

<div><p>Mechanically interlocked polymers and molecules exhibit unique topological, physical, and chemical properties, making them highly promising for applications in molecular machines, molecular switches, artificial muscles, nano-actuators, nano-sensors, and biomedical technologies.…

The Journal of Chemical Physics, 2025, 162, ⟨10.1063/5.0269708⟩. ⟨hal-05099601⟩

• Communication dans un congrès

Microstructuration laser en régimes femtoseconde et nanoseconde : applications pour le packaging

Flavie Braud

2èmes Journées Nationales du Packaging, May 2025, Besançon, France. ⟨hal-05084101⟩

• Communication dans un congrès

Homage to Evangelista Torricelli’s opera geometrica 1644-2024

Raffaele Pisano, Paolo Bussotti

Workshop. Torricelli Yesterady and Today, Accademia Torricelliana di Scienze e Lettere - Faenza & University of Bologna, Italy, May 2025, Faenza and Bologna, Italy. ⟨hal-05003276⟩

• Article dans une revue

Hybridising photovoltaics and thermoelectrics: A detailed-balance analysis

Alexis Vossier, Etienne Blandre, Rodolphe Vaillon

The combination of photovoltaic and thermoelectric converters could potentially lead to an improvement in the efficiency with which solar energy is converted into electricity, thanks to the improved exploitation of the residual heat generated in the PV cells. Using the detailed balance formalism,…

Solar Energy Materials and Solar Cells, 2025, 289, pp.113636. ⟨10.1016/j.solmat.2025.113636⟩. ⟨hal-05065902⟩

• Article dans une revue

Sparse guided wave imaging in highly anisotropic plates with phase skewing and amplitude focusing compensation

Pierre Goislot, Guillemette Ribay, Emmanuel Moulin, Lynda Chehami

This paper introduces a sparse beamforming algorithm designed to compensate for guided wave dispersion while addressing phase skewing and energy focusing in highly anisotropic composite plates. Developed for structural health monitoring, this algorithm targets impact-induced defects, such as barely…

Journal of the Acoustical Society of America, 2025, 157 (5), pp.3390-3401. ⟨10.1121/10.0036595⟩. ⟨hal-05081688⟩

• Article dans une revue

Topological phase transitions of non-Hermitian periodic and disordered elastic systems

Runcheng Cai, Yabin Jin, Yan Pennec, Timon Rabczuk, Xiaoying Zhuang, Bahram Djafari-Rouhani

Topological states have been extensively explored across diverse wave systems in recent decades. However, most research has focused on the periodic and Hermitian systems, while the roles of non-Hermiticity and disorder in topological properties need to be further explored, especially for two-…

International Journal of Mechanical Sciences, 2025, 294, pp.110241. ⟨10.1016/j.ijmecsci.2025.110241⟩. ⟨hal-05063388⟩