Publications

• Article dans une revue

Unlocking the potential of the insulator–metal transition for photocatalysis

B. Grandidier, V. Ordomsky

Designing photocatalysts typically demands complex engineering of junctions. Vanadium dioxide (VO2), however, can spontaneously form homogeneous junctions upon undergoing an insulator–metal transition. This transition in VO2 thin films under light increases the photocatalytic conversion rate of…

Nature Energy, 2026, 11 (4), pp.515-516. ⟨10.1038/s41560-026-02036-3⟩. ⟨hal-05700061⟩

• Communication dans un congrès

Integrated 3 GHz Bandwidth Optical Modulator Operating in the 5-9 µm Wavelength Range

Javier Huertas Pedroche, Victor Turpaud, Luca Lucia, Adel Bousseksou, Hamza Dely, Gia Long Ngo, Stefano Calcaterra, Davide Impelluso, Afonso de Cerdeira Oliveira, Victor Merupo, Emilien Peytavit, Jean-François Lampin, Stefano Barbieri, Jacopo Frigerio, Raffaele Colombelli, Giovanni Isella, Delphine Marris-Morini

A compact electro-optic modulator integrated within a SiGe waveguide operating in the 5−9μm wavelength range is demonstrated. Utilizing a Schottky diode and freecarrier absorption effect, the device achieves at least 3GHz bandwidth and an ER of 1.75∼dB.

2026 IEEE Silicon Photonics Conference (SiPhotonics), Apr 2026, Ottawa, Canada. pp.1-2, ⟨10.1109/SiPhotonics68911.2026.11520768⟩. ⟨hal-05687373⟩

• Communication dans un congrès

Waveguide-pair design co-optimization and tolerance study for hybrid III-V/Si quantum dot DBR lasers

Konstantinos Papatryfonos, Peter Raymond Smith, David Selviah

<div><p>The development of compact, energy-efficient integrated lasers operating at 1.3 µm remains a central goal in silicon photonics, driven by the needs of data communication and optical interconnect applications. In this study, we investigate the lateral co-optimization of the…

Semiconductor Lasers and Laser Dynamics XII, Apr 2026, Strasbourg, France. ⟨10.1117/12.3099179⟩. ⟨hal-05640455⟩

• Communication dans un congrès

Low-defect quantum dot lasers directly grown on silicon analyzed using cross-sectional scanning tunneling microscopy and spectroscopy

Konstantinos Papatryfonos, Jean-Christophe Girard, Mingchu Tang, Christophe David, Alwyn Seeds, Guillemin Rodary, Huiyun Liu, David Selviah

<div><p>Monolithic integration of III-V lasers on silicon is a central objective of silicon photonics, yet direct heteroepitaxy remains challenged by lattice and thermal-expansion mismatches that generate dislocations and other extended defects. Here we report an optimized molecular…

SPIE Photonics Europe, Apr 2026, Strasbourg, France. pp.24, ⟨10.1117/12.3099164⟩. ⟨hal-05597646⟩

• Communication dans un congrès

Low-defect InAs/InGaAs quantum dot lasers directly grown on silicon: scalable fabrication and high-temperature laser characterization

Konstantinos Papatryfonos, Mingchu Tang, Huiwen Deng, Alwyn J. Seeds, Huiyun Liu, David R. Selviah

Direct epitaxial growth of III-V quantum-dot (QD) gain media on silicon offers a route to wafer-scale, monolithically integrated light sources with minimal assembly overhead, but is typically limited by mismatch-induced defects and associated thermal sensitivity. Building on our recently developed…

SPIE Photonics Europe, Apr 2026, Strasbourg, France. ⟨10.1117/12.3099172⟩. ⟨hal-05640449⟩

• Article dans une revue

Fundamental thermovisco mechanical interactions governing the acoustic response of laser-excited nanoparticles

Stefano Giordano, Michele Diego, Francesco Banfi, Michele Brun

In this work, we investigate the thermoacoustic generation and propagation of spherical waves in a viscous fluid induced by a laser-heated spherical particle. Periodic laser excitation gives rise to two coupled mechanisms of acoustic emission. Heat transfer from the particle to the surrounding…

Journal of Applied Physics, 2026, 139 (13), ⟨10.1063/5.0321555⟩. ⟨hal-05594490⟩

• Article dans une revue

Coexistence and interplay of Fabry–Pérot and twin Friedrich–Wintgen bound states in the continuum in a plasmonic double T-cavity

Amina Rezzouk, Soufyane Khattou, Madiha Amrani, Adnane Noual, El Houssaine El Boudouti, Bahram Djafari-Rouhani

Bound states in the continuum (BICs) are typically investigated in terms of distinct formation mechanisms, such as symmetry-protected (SP), Friedrich–Wintgen (FW), or Fabry–Pérot (FP) BICs. However, their coexistence and mutual interaction within a single plasmonic architecture have not been…

Journal of Applied Physics, 2026, 139 (13), pp.133108. ⟨10.1063/5.0324716⟩. ⟨hal-05591439⟩

• Article dans une revue

Micro-Raman Scattering Analysis of Temperature-Dependent Electron Mobility and Fermi Level in n-Doped Homoepitaxial GaN Layers for Power Electronics

Aomar Ezza, Denis Machon, Camille Sonneville, Eric Frayssinet, Yvon Cordier, Dominique Planson, Hassan Maher, Ali Soltani

ACS Applied Materials & Interfaces, 2026, 18 (14), pp.20644-20656. ⟨10.1021/acsami.5c25852⟩. ⟨hal-05662876⟩

• Communication dans un congrès

Deciphering the dysfunctional immunological synapse in acute myeloid leukemia through microfluidic

Sofia Titah, Clara Lewuillon, Faruk Azam Shaik, Aurelie Guillemette, Eva Gez, Nathalie Jouy, Laure Goursaud, Celine Berthon, Salomon Manier, Carine Brinster, William Langue, Tzung Hsuen Khoo, Alexandre Poulain, Sophie Dabo-Niang, Dominique Collard, Bruno Quesnel, Loic Lemonnier, Mehmet Cagatay Tarhan, Yasmine Touil

Abstract Minimal residual disease (MRD) in acute myeloid leukemia (AML) arises from residual leukemic cells that resist chemotherapy and evade immune surveillance, notably through the PD-1/PD-L1 immune checkpoint. These persistent cells are the main source of relapse. Our working hypothesis is that…

American Association for Cancer Research Annual Meeting 2026, Apr 2026, San Diego, United States. pp.4260-4260, ⟨10.1158/1538-7445.AM2026-4260⟩. ⟨hal-05675202⟩

• Article dans une revue

Optimized Haptic Feedback and Natural Prehension System for Robotics and Virtual Reality Applications

Eve Hirel, Odin Le Morvan, Marwan Mahdouf, Prune Picot, Matteo Quinquis, Christophe Delebarre

As robotics prehension systems and virtual reality applications are in constant evolution, the need for high-fidelity haptic interaction increases. This helps ensure and enhance user immersion and handling precision. While commercial haptic interfaces offer high performance, their prohibitive cost…

Sensors, 2026, 26 (7), pp.2222. ⟨10.3390/s26072222⟩. ⟨hal-05687208⟩