Institut Langevin

#RésultatScientifique 🔎 | L’imagerie matricielle ultrasonore : un changement de paradigme pour l’échographie transcrânienne super-résolue

🔬 @instlangevin.bsky.social 🤝 @cnrs.fr @espciparispsl.bsky.social @psl-univ.bsky.social
📍 @cnrs-paris.bsky.social

#RésultatScientifique 🔎 | Révéler la présence d’une cible cachée dans un brouillard épais

🔬 @instlangevin.bsky.social 🤝 @cnrs.fr @espciparispsl.bsky.social @psl-univ.bsky.social
📍 @cnrs-paris.bsky.social

Guiding waves through chaos: Universal bounds for targeted mode transport A universal framework reveals governing laws for optimal wave focusing and maximal energy delivery in chaotic environments.

🌊 Chaos as a resource! Near-optimal energy transport can emerge even with limited control.
@instlangevin.bsky.social y.social @wesleyanuniversity.bsky.social

www.science.org/doi/10.1126/...

#WavePhysics #WaveChaos #EnergyTransport

Reconfigurable and active time-reversal metasurface turns walls into sound routers - Communications Physics Controlling how sound travels in noisy or echo-filled spaces is a long-standing challenge. The authors show that walls covered with programmable acoustic elements can direct sound precisely to chosen ...

🔊 New from @instlangevin.bsky.social:
Using time reversal, researchers turn a simple wall into an acoustic router.
Sharp focusing, boosted transmission, and multiple sound channels inside the same room, all built from the room’s own reverberation.
doi.org/10.1038/s420...

#Acoustics #TimeReversal

🟠 New study from @instlangevin.bsky.social & @ucauvergne.bsky.social :
How shock waves move through granular materials.
Three regimes found from gentle impacts to strong shocks, with a surprisingly constant shock-front width (~10 grains).
#GranularPhysics #ShockWaves doi.org/10.1016/j.me...

Fundamental bounds of wavefront shaping of spatially entangled photons Wavefront shaping enables control of classical light through scattering media. Extending these techniques to spatially entangled photons promises new quantum ap

Can entangled photons beat classical light?
🌀 Researchers from @instlangevin.bsky.social & Hebrew Univ map the limits of wavefront shaping in quantum light—showing when it matches, and when it outperforms, classical optics.
#QuantumOptics #Photonics
doi.org/10.1063/5.02...

Light can find rare “open channels” to pass through disorder. Researchers from Institut Langevin and the Hebrew University of Jerusalem reveal how multimode fiber cavities make them accessible. 💡
#Optics #WavePhysics journals.aps.org/prl/abstract...

Impressive results at NANOP2025 by Lorenzo Soncin: fluorophores mixed with white disordered scattering media exhibit strong spectral changes due to fluorescence photon thermalization with nonzero chemical potential.
@instlangevin.bsky.social @espciparispsl.bsky.social @cnrsingenierie.bsky.social

Summary of results demonstrating the versatility of the sm-FLIM method for a wide range of optical investigations at the nanoscale.

Outstanding presentation today on the final day of NANOP2025 by our colleague Valentina Krachmalnicoff, showcasing single-molecule sensing of electromagnetic landscapes at the nanometer scale using the smFLIM method. @instlangevin.bsky.social @cnrsingenierie.bsky.social @espciparispsl.bsky.social

Non-linear coupling in two non-linear delayed acoustic resonators Building on our previous work on a Hopf resonator that mimics the cochlear amplifier from Reda, Fink, and Lemoult [(2023). Europhys. Lett. 144(3), 37001], we no

🔊 Researchers at @instlangevin.bsky.social study how oscillators synchronize by coupling two nonlinear delayed acoustic resonators near a Hopf bifurcation. From frequency locking to desynchronization, they uncover universal patterns of coherence. #Physics #Synchronization
doi.org/10.1121/10.0...

Detection and characterization of targets in complex media using fingerprint matrices Nature Physics - Imaging through complex media is challenging because scattering results in image blurring. By introducing a fingerprint operator and applying it to the measured reflection matrix,...

How do you find objects hidden in sand or fog? 🌫️🏝️
A team from @instlangevin.bsky.social & TU Wien just published in Nature Physics a new way to “see” through opaque media using a wave fingerprint matrix — making the invisible visible! 🔍✨
Read more: rdcu.be/eI4Mh
#Imaging

Pedro Mecê wins ERC Starting Grant 2025 for MIRACLE-AD👏 The project uses advanced retinal imaging to detect early signs of Alzheimer’s, mapping neuronal & vascular responses at cellular resolution. 🧠👁
A brilliant blend of physics, optics & clinical medicine!
#ERC #RetinalImaging #Neuroscience

Transmission interference microscopy of anterior human eye - Nature Communications By harnessing the eye’s own red-eye glow as back-lighting, researchers delivered sharp, 2 mm-wide views of live cornea and lens cells, unmasking Fuchs dystrophy and enabling low-cost, precise eye diag...

Researchers at Langevin Institute used the “red eye” effect to illuminate the living human eye from behind 👁️✨. This revealed corneal layers, cells, nerve fibers, lens sutures, and guttata in Fuchs’ dystrophy — all in vivo 💡📷.
Congrats to the authors 🎉!
www.nature.com/articles/s41...
#EyeImaging

🚀 New theory of wave transport!
Researchers at Institut Langevin introduce Radiant Field Theory (RFT), extending the classic radiative transfer equation to capture interference and wavefront shaping.
PRL👉 doi.org/10.1103/g3kd...
PRResearch👉 doi.org/10.1103/djhy...
#WavefrontShaping #Optics #Physics

Transmission interference microscopy of anterior human eye - Nature Communications By harnessing the eye’s own red-eye glow as back-lighting, researchers delivered sharp, 2 mm-wide views of live cornea and lens cells, unmasking Fuchs dystrophy and enabling low-cost, precise eye diag...

Congrats to our colleagues S. Alhaddad, A.C. Boccara, and V. Mazlin, & collaborators at Quinze-Vingts National Ophthalmology Hospital for their paper: Transmission interference microscopy of anterior human eye, published in Nature Communications. doi.org/10.1038/s414... @espciparispsl.bsky.social

Félicitations à notre cher collègue, le Professeur Arnaud Tourin, nommé Directeur du Département d'Evaluation de la Recherche de l'HCERES ! Il organisera la conduite des évaluations des entités de recherche recevant des financements publics (près de 500 par an). www.aefinfo.fr/depeche/7356...

Ultrasound matrix imaging for 3D transcranial in vivo localization microscopy Ultrasound matrix localization microscopy provides a three-dimensional, artifact-free, and superresolved image of brain vessels.

🧠✨ Big step forward in brain imaging!
CNRS teams have combined matrix imaging + ultrasound localization microscopy to create super-res 3D images of the brain’s vascular network — artifact-free, beyond MRI & CT.
A breakthrough for stroke diagnosis & prevention. 🚀
www.science.org/doi/10.1126/...

Replaying analog signals backwards with phase preserved is now real. Rare-earth ion-doped crystals + cryo temperatures make real-time wave refocusing possible without digital delays.
🔗 doi.org/10.1364/OL.5...
Kudos to Anne Louchet-Chauvet and Thomas Llauze for this work!

Proud of our colleagues' latest work using guided waves to improve elastography in challenging tissues like tendons. A step forward for more reliable, noninvasive diagnostics!
🔗 Read more in the link doi.org/10.1088/1361...
#MedicalImaging #WavePhysics #Elastography

Félicitations à notre collègue Alex Aubry, qui reçoit le prix J. Jerphagnon 2025 👏
Formé à l’Institut Langevin, il incarne brillamment nos valeurs d’excellence et de recherche transdisciplinaire.
Une belle reconnaissance pour un parcours à la croisée de la science et de l’innovation. Bravo Alex !

photo de groupe devant les remparts de Saint-Malo

Séminaire hors-les-murs de l’Institut Langevin à Saint-Malo 🌊
Deux jours pour penser nos projets autrement, partager nos idées, et prendre un bon bol d’ondes (et d’air marin). Merci à Christelle, Nathalie et Suzanne pour l’organisation parfaite 🙌
#InstitutLangevin #OndesEtImages #SaintMalo

Revealing neurovascular coupling at a high spatial and temporal resolution in the living human retina An optical method reveals neurovascular coupling in the human retina with unprecedented spatial and temporal resolution.

Proud of our team’s latest work in Science Advances—a major step in high-resolution, noninvasive imaging of neurovascular coupling in the human retina. Congrats to all collaborators!
🔗 www.science.org/doi/10.1126/...
@cnrs-paris.bsky.social @espciparispsl.bsky.social @psl-univ.bsky.social

👏 Très belle contribution d’Anne Louchet-Chauvet au Congrès Général de la SFP à Troyes !
Elle a présenté ses travaux sur la détection ultra-sensible de déformations dans un cristal dopé aux terres rares. Des avancées prometteuses pour les capteurs de très haute précision.
#CGSFP2025 #Physique

First edition of the Institut Langevin's bike ride. A great day in the sunshine in the Rambouillet forest.

The second day of #PLASMONICA2025 has started 🔔 with an invited talk on "Sensing electromagnetic landscapes in 3D with single molecules and nm resolution" by Valentina Krachmalnicoff from @instlangevin.bsky.social Paris. We're having the time of our lifetime 😏!

Congratulations to the authors: Romain Pierrat, Julia Rocha, @remicarminati.bsky.social

@cnrs-paris.bsky.social @espciparispsl.bsky.social @psl-univ.bsky.social
Kudos to the authors: Yamil Abraham, Bart Van Tiggelen, Nicolas Benech, Carlos Negrera, Xiaoping Jia, and Arnaud Tourin!

Researchers from @instlangevin.bsky.social and LPMMC used time-reversed ultrasound to measure diffusion in a dense granular medium. A single sensor refocused waves to their origin, revealing information thought lost.
📄 doi.org/10.1103/47wj...

News from Institut Langevin: temporal disorder doesn't damp waves—it just shifts their frequency. No energy loss. No perturbation theory. Just causality at work.
🔗 doi.org/10.1103/td38...
@espciparispsl.bsky.social
@cnrsingenierie.bsky.social
@cnrs-paris.bsky.social
@psl-univ.bsky.social

Congratulations to the authors Romain Pierrat, Julia Rocha and @remicarminati.bsky.social