Publications

• Thèse

High Resolution THz Spectroscopy Based on Frequency Combs and Optically Pumped Molecular Lasers, Spectroscopie THz à Haute Résolution Basée sur des Peignes de Fréquences et des Lasers Moléculaires Pompes Optiquement

Alexandra Khabbaz

The objective of this thesis is to study the use of frequency combs for high-resolution molecular spectroscopy in the terahertz (THz) region of the electromagnetic spectrum. This approach is based on the conversion of an optical frequency comb into the THz domain. Nevertheless, the state of the art…, L'objectif de cette thèse est d'étudier l'utilisation Peignes de fréquence pour la spectroscopie moléculaire à haute résolution dans la région du spectre électromagnétique Térahertz (THz). Cette approche est basée sur la conversion d'un peigne dans le domaine optique vers le…

Physics [physics]. Université du Littoral Côte d'Opale, 2025. English. ⟨NNT : 2025DUNK0571⟩. ⟨tel-04869248⟩

• Chapitre d'ouvrage

Numerical Simulations of Methylammonium Tin Iodide-Based Perovskite Solar Cells

Mohammed Cherif Ramdani, Khadidja Rahmoun, Wissem Benaissa, Katir Ziouche

Perovskite solar cells have attracted significant attention within the scientific community due to their rapidly advancing performance. In particular, inorganic perovskite devices are renowned for their remarkable performance and enduring stability.This study introduces a device optimization…

Technological and Innovative Progress in Renewable Energy Systems, Springer Nature Switzerland, pp.339-344, 2025, Advances in Science, Technology & Innovation, ISBN 978-3-031-71925-7. ⟨10.1007/978-3-031-71926-4_59⟩. ⟨hal-04990775⟩

• Article dans une revue

Experimental observation of mutual coupling in resonator array on thin-metal-film

Surya Revanth Ayyagari, Simonas Indrišiūnas, Alexey Basharin, Vytautas Janonis, Daniil Pashnev, Guillaume Ducournau, Polina Kuzhir, Irmantas Kašalynas

We present the experimental observation of electromagnetic mutual coupling in an array of ring-shaped resonators (meta-atoms) fabricated on a free-standing thin metal film using a maskless direct laser ablation technique. The transmission spectra of various resonator configurations were measured…

Journal of Applied Physics, 2025, 137 (1), ⟨10.1063/5.0245081⟩. ⟨hal-04885168⟩

• Article dans une revue

Investigating Impacts of Local Pressure and Temperature on CVD Growth of Hexagonal Boron Nitride on Ge(001)/Si

Max Franck, Jarek Dabrowski, Markus Andreas Schubert, Dominique Vignaud, Mohamed Achehboune, Jean‐françois Colomer, Luc Henrard, Christian Wenger, Mindaugas Lukosius

The chemical vapor deposition (CVD) growth of hexagonal boron nitride (hBN) on Ge substrates is a promising pathway to high-quality hBN thin films without metal contaminations for microelectronic applications, but the effect of CVD process parameters on the hBN properties is not well understood yet…

Advanced Materials Interfaces, 2025, 12 (1), pp.2400467. ⟨10.1002/admi.202400467⟩. ⟨hal-05216562⟩

• Article dans une revue

Boosting hyperspectral image classification with Gate-Shift-Fuse mechanisms in a novel CNN-Transformer approach

Mohamed Fadhlallah Guerri, Cosimo Distante, Paolo Spagnolo, Abdelmalik Taleb-Ahmed

Hyperspectral Image (HSI) classification categorizes every pixel sample into distinct land-cover types. While CNN-based methods have demonstrated significant advances in feature representation, they often struggle with extracting deep features. On the other hand, transformer models excel in…

Computers and Electronics in Agriculture, 2025, 237, Part A, pp.110489. ⟨10.1016/j.compag.2025.110489⟩. ⟨hal-05123205⟩

• Autre publication scientifique

Advances in Historical Studies [Editor in Chief 14/2]

Raffaele Pisano

2025. ⟨hal-05480618⟩

• Pré-publication, Document de travail

PE-CLIP: A Parameter-Efficient Fine-Tuning of Vision Language Models for Dynamic Facial Expression Recognition

Ibtissam Saadi, Abdenour Hadid, Douglas Cunningham, Abdelmalik Taleb-Ahmed, Yassin El Hillali

Vision-Language Models (VLMs) like CLIP offer promising solutions for Dynamic Facial Expression Recognition (DFER) but face challenges such as inefficient full fine-tuning, high complexity, and poor alignment between textual and visual representations. Additionally, existing methods struggle with…

2025. ⟨hal-05033150⟩

• Article dans une revue

A Sub-400-nW Real-Time Event-Driven Spectrogram Extraction Unit in 28-nm FD-SOI CMOS for Keyword Spotting Application

Soufiane Mourrane, Benoit Larras, Sylvain Clerc, Andreia Cathelin, Antoine Frappé

Considering the power-hungry nature of speech processing, a keyword spotting (KWS) unit, used to detect multiple spoken words, is often integrated as a front-end layer. KWS systems are always active, and thus, it is extremely important to optimize the devoted power budget. In this context, this…

IEEE Journal of Solid-State Circuits, In press, ⟨10.1109/JSSC.2024.3475948⟩. ⟨hal-04793373⟩

• Communication dans un congrès

Imagerie passive de couches sur substrats par corrélation de champ acoustique haute fréquence

Nada Ben Jafela, Lynda Chehami, Marc Duquennoy, Emmanuel Moulin, Nikolay Smagin, Dame Fall, Zakariae Oumekloul

Les structures couche sur substrat sont généralement sujettes à divers types de défauts, en particulier ceux liés au processus de fabrication lors de la croissance des films minces. Actuellement, une possibilité pour inspecter ces structures consiste à utiliser des transducteurs IDTs en émission et…

CFA 2025 - 17e Congrès Français d'Acoustique, Société Française d'Acoustique (SFA), Apr 2025, Paris, France. ⟨hal-05365912⟩

• Communication dans un congrès

Inverted BER Trends for Energy-Detected GRSM-MQAM Massive MIMO Downlink

Oshin Daoud, Haïfa Farès, Yahia Medjahdi, Laurent Clavier, Amor Nafkha

This work investigates Generalized Receiver Spatial Modulation (GRSM) in a massive MIMO downlink scenario over millimetre wave channels. While GRSM enhances spectral efficiency (SE) and reduces power consumption, indexing additional bits using the spatial dimension increases the vulnerability to…

2025 21th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), Oct 2025, Marrakesh, Morocco. pp.1-7, ⟨10.1109/wimob66857.2025.11257439⟩. ⟨hal-05395480⟩