I’m a physicist who enjoys designing, building, and analysing experiments that reveal how neutrinos behave — and how they might be used for society. My path has taken me from searching for dark matter with telescopes to studying neutrinos, elementary particles that link the microscopic world to the evolution of the Universe.

I started in 2000 with the EROS2 experiment at La Silla Observatory, using microlensing to probe galactic dark matter in the form of massive compact halo objects (PhD). I then joined LENS at MPIK to study low-energy solar neutrinos (Post-Doc). Returning to France in 2002, I co-initiated the Double Chooz experiment. Our collaboration played a key role in the discovery and precise measurement of the third neutrino oscillation angle. I was also interested in potential applications, and from 2004 to 2016 I worked on the NUCIFER experiment, which demonstrated the use of neutrinos for nuclear reactor monitoring in connexion with the IAEA.

Until March 2025, I was Research Director at CEA, before joining the Max Planck Institute for Nuclear Physics to lead the independent research group OMNIA. I am also a DFG Mercator Fellow with the SFB1258, collaborating on the NUCLEUS experiment.

These days, my main focus is on KATRIN, analysing data in the search for sterile and relic neutrinos, and on NUCLEUS/CRAB, where we explore coherent neutrino scattering with millikelvin cryogenic detectors equipped with quantum sensors. 

Beyond these flagship experiments, I spend a good part of my time developing new ways to detect and study neutrinos, building on technologies developed over the past decades. This work often lies at the crossroads of particle, nuclear, atomic, and solid-state physics — an interdisciplinarity I particularly enjoy.

When I’m not in the lab, you’ll probably find me with my family, on a hockey field, running 400 or 800 meters, or wingfoiling on one of the lakes near Heidelberg.