Publicaciones

• Article dans une revue

Low-temperature cotunneling electron transport in photoswitchable molecule-nanoparticle networks.

Yannick Viero, David Guérin, Dominique Vuillaume

We report the temperature-dependent (4.2 - 300 K) electron transport properties (current-voltage) of photo-switchable two-dimensional arrays of gold nanoparticles (10 nm in diameter) functionalized by azobenzene derivatives. Under UV-light irradiation at 4.2 K, the azobenzene moieties are switched...

Journal of Applied Physics, 2025, 138, pp.074304. ⟨10.1063/5.0284541⟩. ⟨hal-05100137v2⟩

• Article dans une revue

Advancing medical question answering with a knowledge embedding transformer

Xiang Zhu, Mustaqeem Khan, Abdelmalik Taleb-Ahmed, Alice Othmani

Efficient medical question answering is essential for better patient care. Despite progress since Eliza (1966), even advanced LLMs (e.g., GPT-4) struggle with medical data. This study presents a system combining knowledge embedding and transformers. It includes a knowledge understanding layer and...

PLoS ONE, 2025, 20 (8), pp.e0329606. ⟨10.1371/journal.pone.0329606⟩. ⟨hal-05217396⟩

• Communication dans un congrès

Towards THz-Compatible Microfluidics: Challenges and Strategies

Ali Reda, Céline Chevalier, Jean-François Chateaux, Magalie Faivre, Cécile Jamois, Steve Arscott, Romain Peretti

2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Aug 2025, Helsinki, Finland. pp.1-2, ⟨10.1109/IRMMW-THz61557.2025.11319935⟩. ⟨hal-05490496⟩

• Communication dans un congrès

Terahertz Far-Field Measurements of a Meta-Atom Composed of Concentric Disk and Ring

Surya Revanth Ayyagari, Simonas Indrišiūnas, Daniil Pashnev, Guillaume Ducournau, Irmantas Kašalynas

Resonance behavior of a single meta-atom composed of concentric disk and ring with inter-bridges embedded in a free-standing metal film was investigated experimentally and numerically. The meta-atom was integrated either in square or in circular aperture aiming to exhibit transparency at the...

2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Aug 2025, Helsinki, Finland. pp.1-2, ⟨10.1109/IRMMW-THz61557.2025.11320033⟩. ⟨hal-05490457⟩

• Communication dans un congrès

Spikeless Dielectric Waveguides for 600-GHz-Band Terahertz Communications

Nguyen Ngo, Guillaume Ducournau, Weijie Gao, Hadjer Nihel Khelil, Rita Younes, Abdu Subahan, Pascal Szriftgiser, Hidemasa Yamane, Yoshiharu Yamada, Shuichi Murakami, Masayuki Fujita

We propose a spikeless dielectric waveguide that achieves robust coupling between a silicon waveguide and a metallic hollow waveguide without relying on conventional tapered transitions. The waveguide has a large fractional bandwidth of 61% (330–620 GHz) with an average coupling efficiency of –1.7...

2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Aug 2025, Helsinki, Finland. pp.1-2, ⟨10.1109/IRMMW-THz61557.2025.11319630⟩. ⟨hal-05490444⟩

• Communication dans un congrès

High bandwidth THz polarization modulation of Inverse Spin Hall emitters exploiting Spin Reorientation Transition of an anisotropic CoFeB layer

Geoffrey Lezier, Pierre Kolejak, Filip Gaizura, Jean-François Lampin, Nicolas Tiercelin, Mathias Vanwolleghem

We demonstrate an efficient and simple modulation of the polarization in Inverse Spin Hall Effect spintronic Terahertz Emitters (ISHE STE), by rapid switching of the magnetization using a high-frequency magnetic field, enhanced by field induced Spin Reorientation Transition (SRT). The instability...

2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Aug 2025, Helsinki, Finland. pp.1-2, ⟨10.1109/IRMMW-THz61557.2025.11319845⟩. ⟨hal-05490512⟩

• Communication dans un congrès

Farfield and Coupling Analysis of an Ultra Broadband THz Device

Sagnik Banerjee, Kewei Wang, Ali Reda, Théo Hannotte, Jean-Francois Lampin, Flavie Braud, Romain Peretti

This paper analyzes the farfield radiation pattern of a broadband light concentrating device aimed at enhancing light-matter interactions at THz frequency where a 1mm long waveguide opens into an exponentially tapered antenna. We investigate the tradeoff with respect to the radiation pattern on the...

2025 50th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Aug 2025, Helsinki, France. pp.1-3, ⟨10.1109/IRMMW-THz61557.2025.11319861⟩. ⟨hal-05490473⟩

• Article dans une revue

Absorption properties of hyperuniform and Poisson Point Process distributed metasurfaces at infrared wavelengths

R. Buisine, O. Vanbesien, D. Dereudre, Ludovic Burgnies, E. Lheurette

In this article, we analyze the extinction and absorption properties of randomly distributed Metal–Insulator–Metal (MIM) metasurfaces operating at an infrared wavelength. Our attention has been focused on the comparison between correlated disordered, namely, hyperuniform, and Poisson Point Process...

Journal of Applied Physics, 2025, 138 (6), pp.063101. ⟨10.1063/5.0272612⟩. ⟨hal-05374899⟩

• Article dans une revue

Impact of Multi-Bias on the Performance of 150 nm GaN HEMT for High-Frequency Applications

Mohammad Abdul Alim, Christophe Gaquière

This study examines the performance of a GaN HEMT with a 150 nm gate length, fabricated on silicon carbide, across various operational modes, including direct current (DC), radio frequency (RF), and small-signal parameters. The evaluation of DC, RF, and small-signal performance under diverse bias...

Micromachines, 2025, 16, ⟨10.3390/mi16080932⟩. ⟨hal-05234668⟩

• Article dans une revue

Explicit noise and dissipation operators for quantum stochastic thermodynamics

Stefano Giordano, Fabrizio Cleri, Ralf Blossey

The theory of open quantum systems plays a fundamental role in several scientific and technological disciplines, from quantum computing and information science to molecular electronics and quantum thermodynamics. Despite its widespread relevance, a rigorous formulation of quantum dissipation in...

Journal of Statistical Mechanics: Theory and Experiment, 2025, 2025, ⟨10.1088/1742-5468/adf4bd⟩. ⟨hal-05300835⟩