Complex Media Optics Team

#NewPreprint
Check out this new paper in collaboration with Tsinghua University and spearheaded by current and former team member Ziao Wang and Hao Wang.
"Training deep physical neural networks with local physical information bottleneck"
arxiv.org/abs/2602.09569

And 🥁 the final program of the *"Image Science" Gordon Research Conference*, to take place in Italy April 26-May 1st, is out!
Please take some time to check the program, apply, *share* with your colleagues.
www.grc.org/image-scienc... (1/N)

A graphic visualization representing a Christmas tree formed entirely of keywords on a black background. The terms are colored in red, pine green, gold, and silver. In the center, the names 'Sylvain' and 'Hilton' as well as the year '2025' appear in very large characters. The branches of the tree are made up of technical scientific terms such as 'Complex Media', 'Transmission Matrix', 'Raman', 'Quantum Imaging', 'Speckle', and 'Neural Networks'. The image symbolizes the scientific production and research axes of the laboratory for the past year.

A merry Christmas from the COMEDIA team at LKB !

I was deeply honored to receive yesterday the Cecile DeWitt Morette Prize / Ecole des Houches / CFM foundation prize from the french @academiesciences.bsky.social, crowning a lot of hard work, creativity and fun with my team @comedialkb.bsky.social. Thank you!

Check out this upcoming symposium organized by hugo Defienne's team and us. Register here : quantumcomplex.sciencesconf.org

#NewPreprint #Quantum
"Harnessing Optical Disorder for Bell Inequalities violation"
a joint work with Hugo Defienne's team.
arxiv.org/abs/2509.21052

In short : a speckle essentially has a random polarization state at any position, we exploit this to show we can violate a BI.

This is the end of a short visit to ETH Zurich, I was very intimidated to visit the math department (as an experimentalist) but it turned out great, thanks to my host Habib Ammari. Also great to (re)connect to colleagues in Physics, Mechanics & engineering, and enjoy a nice Picasso exhibition.🇨🇭🧀🍫

Computational field-resolved coherent chemical imaging Nature Communications - A vibrational spectral phase retrieval approach to broadband CARS spectroscopy is presented, therefore enabling supervised compressive CARS microspectroscopy for...

#NewPaper on the blend of computational microscopy with chemical imaging: enabling high-speed quantitative CARS imaging via a new compressive Raman framework.
Kudos @spzhao0724.bsky.social
A collaboration between @lkblab.bsky.social and @ukmlv.bsky.social from Washington Uni St.Louis rdcu.be/eCjLz

Optical next generation reservoir computing - Light: Science & Applications Light: Science & Applications - Optical next generation reservoir computing

#NewPaper #OpticalComputing

"Optical Next generation reservoir computing" by Hao Wang et al.

www.nature.com/articles/s41...

Always a pleasure to have the visit of our alumni! Today Michael Mounaix from U Queensland gave us a seminar on his impressive recent work on arbitrary light shaping using an MPLC, including a demonstration using the team chicken !

If you’re in CLEO Munich don’t miss the talk of Malo Joly today at 11 on Quantum Extreme Learning Machines !

Congrats to our newly minted PhD, Lea Chibani, who successsfully defended today !

Finally out !
journals.aps.org/prresearch/a...
"Classification of quantum states of light using random measurements through a multimode fiber"
after several years, the last work of the PhD of Saroch Leedumrongwatthanakun, collaboration with Mauro Paternostro's group, is out in Phys. Rev. Research.

We have multiple postdoc openings in *optical computing* 🔦+🤖, *computational microscopy* 🔬+🧠, and *nanophotonics*💡+⚛️. Don't hesitate to get in touch / spread the word!

📢 @sylvaingigan.bsky.social joins #EOSAM2025!
His tutorial, "Photonics for AI: Coming of Age?", will explore optical machine learning, from random matrix multiplication via light scattering to applications in modern ML tasks.
🔗More info: tinyurl.com/yc8y5tyz
🚨Submit by tomorrow: tinyurl.com/5ec68bk6

🥁🚨📣SAVE THE DATE📣🚨🥁

The 2026 "Image Science" Gordon Research Science Conference (GRC) 🔭🎇🔬🔦🧬📸🖥️
www.grc.org/image-scienc...
is coming to Europe !

WHEN ? April 26 - May 1, 2026
WHERE? Renaissance Tuscany Il Ciocco, Lucca (Italy)

*Stay tuned* for our program in the coming months.
📣Please share📣

a nice thread on our recent preprint by Jacopo ! 🤌😍

#PhysicsJournalClub
"Three-dimensional holographic imaging of incoherent objects through scattering media"
by Y. Baek, @hiltondeaguiar.bsky.social and @sylvaingigan.bsky.social
arXiv:2502.01475v1

a 🧵

1/
⚛️💡🧪

🚨 #NewPreprint 🚨

"Three-dimensional holographic imaging of incoherent objects through scattering media" by Dr. YoonSeok Baek

arxiv.org/abs/2502.01475

Congratulation to our former group member @giannijacca.bsky.social for this amazing news! All the best for his new position !

Happy to share our recent publication in @opticapubsgroup.bsky.social Photonics Research,
Fourier synthetic-aperture-based time-resolved terahertz imaging.
Read more at doi.org/10.1364/PRJ....
Congratulations to all the authors, @sylvaingigan.bsky.social, @optica.bsky.social, @lkblab.bsky.social

Last Thursday, our one and only Louis Delloye defended his PhD with flying Colors 🌈 . Congrats Dr. Delloye!

you can also follow our collaborators and friends here with this second starter kit :
go.bsky.app/6yUuks1

follow our current and former team members with this starter kit :
go.bsky.app/3w8zdX7

some additional pictures of our discussions

group photo !

Last week for our group retreat, we climbed up the @sorbonne-universite.fr's main tower to take a bit of perspective (litterally), and discuss how we do science, and how to do it better together, with some of our our alumni and close collaborators.

Toward video-rate compressive spontaneous Raman imaging via single-photon avalanche diode arrays Spontaneous Raman microscopy is well-known for its remarkable chemical contrast yet suffers from slow acquisition speeds. Recently, the compressive Raman microspectroscopy framework has shown that a s...

finally out: we demonstrate unprecedented imaging speeds with the spontaneous Raman contrast using the compressive Raman framework and a nice SPAD array. doi.org/10.1364/OL.5... Great collaboration with the AQUA group @EPFL

What better way to start this journey on 🦋 than sharing our latest work?

We studied how a complex environment influences the formation of groups in active colloids. How did we do it?
Follow the short thread below and/or just check:
www.nature.com/articles/s42...

@sylvaingigan.bsky.social