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Nouvelle percée en imagerie spectrale : l’analyse en 3D de matériaux photosensibles via un "jumeau numérique"

sylvie.kemenovic — Thu, 09 Oct 2025 13:41:37 +0000

New breakthrough in spectral imaging: 3D analysis of photosensitive materials using a digital twin sylvie.kemenovic Tue, 10/14/2025 - 17:15

Spectral imaging

In photonic analysis, a spectrum is obtained by sending a beam onto a sample, varying a parameter, often the incident (or re-emitted) energy, and collecting the response on a detector. By collecting the signal pixel by pixel, a spectral image is generated. This image is referred to as hyperspectral when the energy range is continuous, and multispectral when it is discrete.
Spectral imaging using photon excitation in the X-ray, UV or visible range is widely used to identify chemical compounds and classify pixels according to their composition, but also to spatially classify material for various fields of application: satellite remote sensing, forest management, plant biology, food and heritage chemistry.
However, many imaging modalities involve high doses of radiation, which can lead to irreversible damage to samples.

Preserving sample integrity and analysing photosensitive materials

Advanced spectral imaging techniques face an inherent trade-off between signal intensity and sample integrity.
In chemical imaging, the large amount of information collected with hyperspectral and multispectral imaging involves a high dose of electromagnetic radiation, which is necessary to collect a sufficient signal but can irreversibly damage inorganic samples and, even more so, organic samples. Various approaches are used to obtain sufficient count statistics while mitigating damage, such as cryogenic freezing. However, cold temperatures can themselves be very detrimental to sample integrity.
Furthermore, strategies based on increasing beam size, reducing beam flux and/or acquisition time have a significant impact on the data collected. Reducing the dose can pose the challenge of disentangling the collected signal. A critical choice must therefore be made to find a compromise between sample preservation and the amount of knowledge collected.
Traditionally, the optimisation of acquisition parameters, such as source wavelength, intensity and exposure time, has been based on empirical adjustments aimed at improving image contrast.

X-ray Raman spectral imaging

Researchers have identified a particularly promising method: X-ray Raman scattering. This technique, which requires a large instrument (synchrotron), has the unique ability to probe light elements in 3D (carbon, oxygen, nitrogen, etc.). However, it requires extremely high doses of radiation, making it impossible to analyse photosensitive materials.

The creation of a ‘digital twin’ paves the way for 3D analysis of photosensitive materials

To overcome this obstacle, they developed a ‘digital twin’ of an imaging experiment — i.e. a virtual model of the experiment, combining experimental and ‘synthetic’ data, which can be used to simulate the result obtained by digitally varying the parameters of the experiment.
They demonstrated that the development of a suitable ‘digital twin’ enables the imaging of radiosensitive organic samples. They tested a large number of experimental configurations and identified those that led to better classification of chemical species.

Its use made it possible to reduce the acquisition time tenfold while maintaining operation below the damage threshold, paving the way for high-definition spectral imaging with minimal degradation of sensitive organic samples.
By fixing the dose received by the sample, they determined the experimental conditions that would allow data to be collected on a particularly photosensitive paint sample.

The hybridisation of the real world of the experiment and the synthetic world of the digital twin has enabled 3D speciation of photosensitive materials and paves the way for faster and more efficient imaging modalities, preserving samples from biology to chemistry and materials science.

Interdisciplinary and multi-institutional work

The international team consists of:

Laure CAZALS, Lauren DALECKY and Loïc BERTRAND: laboratoire de chimie, "Photophysique et Photochimie Supramoléculaires et Macromoléculaires" (PPSM - ENS Paris-Saclay, CNRS, Université Paris-Saclay),
Agnès DESOLNEUX: laboratoire de mathématiques, le Centre Borelli (ENS Paris-Saclay, CNRS, Université Paris-Saclay)
Simo HUOTARI: Department of Physics of University d'Helsinki
Christoph SAHLE and Alessandro MIRONE: synchrotron européen ESRF
Serge Cohen: laboratoire IPANEMA (CNRS, UVSQ, MNHN, Department of Culture)

This work was initiated by an unprecedented collaboration between the chemistry and mathematics departments of ENS Paris-Saclay, and benefited from a Long Term Project at the European synchrotron ESRF (HG-171). It was funded by the European Commission as part of the GoGreen project (GA no. 101060768).

Contacts scientifiques

Loïc Bertrand (ENS Paris-Saclay)
+33 6 81 33 28 23
loic.bertrand [at] ens-paris-saclay.fr (Envoyez un mail)

Agnès Desolneux
(CNRS / ENS Paris-Saclay)
agnes.desolneux [at] ens-paris-saclay.fr (Envoyez un mail)

An international team of researchers from ENS Paris-Saclay, CNRS, ESRF and the University of Helsinki has produced a digital twin that enables 3D analysis of photosensitive materials, such as the paint used by the great masters.
They studied the conditions for minimising the dose of X-rays applied to a sample during analysis. By creating a digital twin of the experiment, they were able to explore a wide range of experimental parameters. Their study, published in the journal Science Advances, shows that it is possible to reduce the dose used by a factor of ten while retaining the ability to determine the stratigraphy of a paint sample, based on the optimal values identified by the algorithm.
This approach now allows the analysis of highly photosensitive samples using methods previously considered too aggressive for these materials.

Publication dans la revue Science Advances

Prix Nobel d’économie 2025, Philippe Aghion, un alumni de l’ENS Paris-Saclay

sylvie.kemenovic — Tue, 14 Oct 2025 14:03:08 +0000

2025 Nobel Prize in Economics winner Philippe Aghion, an alumnus of ENS Paris-Saclay sylvie.kemenovic Tue, 10/14/2025 - 17:05

His main research work

Philippe Aghion profoundly renewed our understanding of growth by developing, with Peter Howitt, the Schumpeterian theory based on creative destruction. In this theory, innovation continually replaces obsolete technologies and fuels long-term growth. (Ref.: Aghion et Howitt, 1992, Econometrica)

Other of his works show that competition can stimulate innovation and that institutions play a decisive role in transforming individual creativity into collective progress. (Ref.: Aghion et al., QJE, 2005)

He also analysed how innovation can both widen inequalities and promote social mobility, depending on the educational, fiscal and industrial policies that accompany technological change. (Ref.: Philippe Aghion, Alexandra Roulet, Repenser l’État, 2011, le Seuil)

His research on the role of the state highlights the need for a public framework capable of encouraging research and competition while limiting exclusionary effects. (Ref.: Aghion, Antonin et Bunel, Le pouvoir de la destruction créatrice, 2021, Éditions Odile Jacob)

Finally, his recent work on artificial intelligence examines how this technological revolution can increase productivity and support employment, provided that institutions adapt training and labour reallocation to new technologies. (Ref: Aghion et Bunel, 2024. “AI and Growth: Where Do We Stand,” Fed. Reserve Bank of San Franciso Working Paper)

This exceptional career path also recognises the scientific rigour, disciplinary openness and intellectual ambition of ENS Paris-Saclay and the Paris-Saclay University ecosystem.

Growth and innovation

Philippe Aghion explains the current strength of the US economy by its capacity for innovation, particularly in high-tech sectors such as digital technology, artificial intelligence (AI) and biotechnology.

"The key factor is technological leadership. This allows them to control value chains, assert their commercial strength, and ensure the supremacy of the dollar by attracting foreign savings to finance their debt."
According to Philippe Aghion, France has failed to take advantage of the revolutions in information and communication technologies (ICT) and biotechnology through innovation.

Expanding the market for innovative new products

His work profoundly renewed growth theory by demonstrating the central role of the process of creative destruction, whereby technical progress replaces old technologies, generating both economic progress and challenges.
"To become a true economic power, Europe must expand the market for new innovative products and develop a financial ecosystem that attracts savings towards innovation." These savings must be better directed towards risk and promote disruptive innovation or the large-scale development of high-tech activities.

Investing in education: a priority

Philippe Aghion emphasises the importance of education. He points out that innovation cannot be conceived without an ambitious education policy. This vision is in line with the values upheld by ENS Paris-Saclay: to train rigorous, committed and multidisciplinary minds.
"By investing in education, we will produce more innovators and our society will become more inclusive. France must first invest in its education system. There are many lost Albert Einsteins and Marie Curies, i.e. gifted children who have not been exposed to the knowledge they need to become innovators. A good education system is the cornerstone of any serious innovation policy. This requires well-trained and well-paid teachers, homework done at school, and individual monitoring of pupils."

The quotes from Mr Aghion are taken from the article
in the special edition of Le Monde – "France, héritages d’une puissance", Sept.-Nov. 2025.

His career

Philippe Aghion is a former student of the Mathematics Department (class of 1976-1980) at ENS Cachan (formerly ENS Paris-Saclay). He then continued his studies at Paris 1, then at Harvard, where he obtained a PhD in economics. Upon obtaining his PhD, he was recruited as an assistant professor at MIT (1987-1989).

He has had a brilliant academic career: professor at MIT, Harvard, University College London, and now holder of the chair in ‘Economics of Institutions, Innovation and Growth’ at the Collège de France, as well as Centennial Professor at the London School of Economics.

Awards and honours

2025: Nobel Prize in Economics 2025 with Joel Mokyr and Peter Howitt.
2020: Frontiers of Knowledge Award with Peter Howitt for their “Schumpeterian theory of growth”.

Philippe Aghion, an alumnus of the mathematics department at ENS Cachan (formerly ENS Paris-Saclay), has been awarded the 2025 Nobel Prize in Economics, alongside Joel Mokyr (Northwestern University) and Peter Howitt (Brown University).
A specialist in growth and innovation, Philippe Aghion, together with Peter Howitt, formalized the concept of creative destruction theorized by Joseph Schumpeter, thus providing a rigorous framework for understanding the role of innovation in long-term economic dynamics.
Congratulations!

Site Internet des prix Nobel

Collège de France

Calendrier de la rentrée 2025/2026

Aichatou.Sow — Mon, 07 Jul 2025 10:08:51 +0000

Calendar for the start of the 2025/2026 academic year sylvie.kemenovic Wed, 09/03/2025 - 16:08

Cliquez sur le lien de votre choix :

Nouveaux normaliennes et normaliens : primo entrants
Étudiants internationaux (primo entrants)
Réunions des départements (obligatoire pour les primos)
2ème année
3ème et 4ème année
Dates des événements
Congés
Questions/Réponses (FAQ)

Nouveaux normaliennes et normaliens : primo entrants

Nous vous adressons nos félicitations pour votre admission à l’ENS Paris-Saclay et vous souhaitons la bienvenue dans votre nouvelle école.

Dispositif AIDéR : Accompagner Informer les étudiants et normaliens dans leurs Démarches de Rentrée

Les services et les DER se rassemblent du 28 août au 18 septembre, du lundi au jeudi, de 10h à 14h dans l’Atrium pour vous renseigner, vous informer, vous aider dans vos démarches de rentrée.

Vendredi 29 août : accueil des familles des normaliens primo-entrants

10 h - 15h : Journée accueil des parents - Hall Emmy Noether
L’École organise un accueil des familles des normaliens primo-entrants (première et seconde année) : pensez à vous inscrire à la journée d'accueil (inscription obligatoire).

10h à 14h : Trois créneaux de visites du bâtiment ENS Paris-Saclay (10h / 11h / 14h)

Lundi 1er septembre

14h à 16h : amphi de rentrée primo arrivant - Amphi Alain Aspect
16h à 18h : Forum des associations + stand des partenaires (banques, mutuelles)

Mardi 2 septembre

9h30 - 11h30 (obligatoire pour les primo-entrant·es recruté·es sur concours CPGE des filières PSI/PT/TSI/BUT et sur dossier en SPI) : réunion de présentation des Sciences pour l'Ingénierie - Amphi Alain Aspect
13h15 - 14h (obligatoire pour les 1A et 2A) : sensibilisation à l'éthique et à l'intégrité scientifique, plagiat - Amphi Alain Aspect
14h - 15h30 : présentation des labo en 180 secondes - Amphi Alain Aspect
15h30 - 17h : forum des laboratoires de l'ENS Paris-Saclay - Hall Emmy Noether
17h30 - 18h30 : présentation sport - Amphi Alain Aspect

Mercredi 3 septembre

9h - 17h30 : journées "portes ouvertes" des départements d'enseignement et de recherche (DER) - Atrium Germaine Tillion
13h - 14h : présentation du service de santé étudiante (SSE) de l'Université Paris-Saclay - Amphi Alain Aspect
17h45 – 19h15 : présentation culture (Scène de recherche, BDA) - Amphi Alain Aspect

Jeudi 4 septembre : formations obligatoires

9h à 15h : formations obligatoires sur les violences sexistes et sexuelles (VSS), les comportements à risque et le racisme et antisémitisme - Amphi Alain Aspect, Dorothy Hodgkin et Scène de recherche. Ces formations sont en présentiel.
- Groupe A : VSS à 9h / Comportements à risques à 11h / Racisme et antisémitisme à 14h : inscrivez-vous en ligne (140 places)
- Groupe B : Racisme et antisémitisme à 9h / VSS à 11h / Comportements à risques à 14h : inscrivez-vous en ligne (140 places)
- Groupe C : Comportements à risques à 9h / Racisme et antisémitisme à 11h / VSS à 14h : inscrivez-vous en ligne (140 places)

Vendredi 5 septembre : formation obligatoire

9h – 12h : formation obligatoire sur les transitions écologiques et développement soutenable - Amphi Alain Aspect et Scène de recherche. Cette formation est en présentiel.

Lundi 8 septembre

11h - Amphi D. Hodgkin : amphi de choix concours MP
11h15 - Amphi D. Hodgkin : amphi de choix concours PC
11h30 - Amphi D. Hodgkin : amphi de choix concours PSI
11h45 - Amphi D. Hodgkin : amphi de choix concours BCPST
14h – 18h : rentrée pédagogique

Mercredi 10 septembre

18h30 : webinaire présentation du diplôme

Jeudi 11 septembre (obligatoire)

13h30 - 15h30 : journée "Préambule", le forum du diplôme, de la vie étudiante et de la prévention - Atrium Germaine Tillion :
- 1A & 2A primos : 13h30 – 15h30

RÉUNIONS OBLIGATOIRES DANS VOS DÉPARTEMENTS

Consultez les sites Internet de vos départements pour voir les dates obligatoires.

Anglais : consultez le calendrier de rentrée du DER Anglais.
Biologie : consultez le calendrier de rentrée du DER de biologie.
Chimie : consultez le calendrier de rentrée du DER Chimie.
Design : consultez le calendrier de rentrée du DER Design.
Informatique : consultez le calendrier de rentrée du DER Informatique.
Mathématiques : consultez le calendrier de rentrée du DER de maths.
Physique : consultez le calendrier de rentrée du DER de physique.
Sciences humaines et sociales : consultez le calendrier de rentrée du DER SHS.
Sciences pour l'ingénieur :
- DER Génie Civil et Environnement : consultez le calendrier de rentrée du DER GCE.
- Génie Mécanique : consultez le calendrier de rentrée du DER GM.
- Sciences de l’ingénierie électrique et numérique (SIEN) : consultez le calendrier de rentrée du DER SIEN.

Rentrée des étudiantes et étudiants internationaux

Vendredi 19 septembre

12h30 à 14h : accueil des étudiants internationaux primo-arrivants - LUMEN
Afin d'organiser le buffet de bienvenue, merci vous inscrire en ligne pour confirmer votre présence.

LUMEN
8 avenue des Sciences
91190 - Gif-sur-Yvette
Venir au Lumen

2ème année

Jeudi 28 août

10h - 11h30 : rentrée des normaliens en 2ème année (non primo-entrants) inscrits en M1 ou L3 (interface et post-année joker) - Amphi Alain Aspect

Mercredi 10 septembre

18h30 : webinaire présentation du diplôme

Jeudi 11 septembre (obligatoire)

13h30 - 17h : journée "Préambule", le forum du diplôme, de la vie étudiante et de la prévention - Atrium Germaine Tillion :
- 2A primos : 13h30 – 15h30
- 2A non primos : 15h30 – 17h

3ème et 4ème année

Jeudi 28 août

14h - 15h : rentrée des normaliens en 3ème et 4ème année M2 Fesup, M2R, ARPE, Interface, Année de recherche thématique (ARRC, ARTeQ, ARIA, ARÉco - Amphi Alain Aspect + zoom

Événements

WEC : 3, 4, 5 octobre 2025
Jury demande d’équivalence : 16 octobre 2025
Jury diplôme session 1 : 13 novembre 2025
Semaine des carrières : 1er décembre au 5 décembre 2025
Jury diplôme session 2 : 22 janvier 2026

Congés 2025/2026

Vacances de Toussaint : 24 octobre au 1er novembre 2025
Vacances de Noël : 19 décembre au 5 janvier 2026
Vacances d’hiver : 27 février au 9 mars 2026
Vacances de printemps : 24 avril au 4 mai 2026

Crédit photo : Laurence Godart

dsve [at] ens-paris-saclay.fr (Direction scolarité et vie étudiante)

École

Student

Academic

Retrouvez les principales dates 2025/2026. Des questions sur votre rentrée ? Consultez le FAQ pour bien préparer votre arrivée sur le campus.
Et n'oubliez pas de vous inscrire à l'école et de faire votre demande de logement si nécessaire.

FAQ

Comment s'inscrire ou se réinscrire ?

Normalien·ne élève ou étudiant·e, étudiants des masters ou de la formation continue, vous devez vous inscrire chaque année à l'ENS Paris-Saclay.

Calendrier : la campagne des inscriptions et réinscriptions administratives pour l'année universitaire doit être finalisée au plus tard le 31 octobre 2025.

Cette inscription administrative est obligatoire chaque année permet d’accéder d'obtenir votre carte étudiante ou de vous inscrire aux activités sportives et pour avoir vos conventions de stage...

Consultez toutes les informations pratiques avant de vous inscrire/réinscrire en ligne sur Coriandre.

Pour toute question, sos-inscription [at] ens-paris-saclay.fr (contactez par mail la Direction scolarité et vie étudiante)

Étudiants internationaux : quelles démarches à faire avant d'être en France?

Félicitations pour votre admission à l'ENS Paris-Saclay !

En tant que nouvel arrivant à l'École, nous vous détaillons plusieurs informations importantes et utiles pour bien démarrer votre séjour. Elles s'adressent aux étudiantes et étudiants, doctorantes et doctorants et chercheuses et chercheurs internationaux en séjour à l'ENS Paris-Saclay.

Consultez la page dédiée aux démarches.

Comment se loger ?

Consultez toutes les informations pour trouver un logement pour la rentrée 2023/2024.
Le nombre de place étant limité, il vous est conseillé d'engager dès à présent vos recherche de logement.

Consultez la page dédiée au logement.

Pour toute question, contactez logement [at] ens-paris-saclay.fr ( )title="logement [at] ens-paris-saclay.fr"

Comment se restaurer sur le campus ?

Le restaurant universitaire CROUS et la cafétéria "Kfé by health inside" (coffee shop bio & healthy pour les petit-déjeuner, déjeuner et goûter) vous accueillent dans le bâtiment.

Manger au restaurant universitaire
Vous devez avoir votre carte d'étudiant pour vous inscrire car elle tient lieu de carte paiement au restaurant CROUS.
L'application Izly sur smartphone vous permet de mettre de l'argent sur votre compte via votre carte bleue. Vous trouverez la procédure pour vous inscrire sur IZLY sur notre Intranet.

Découvrez les services de restauration sur le campus.

Quels sports sont proposés à l'École ? Comment s'inscrire ?

L'organisation des sports s'opère à l'échelle de l'Université Paris-Saclay sur des installations sportives mutualisées.

Consultez le portail des sports.

Quelles sont les associations et les clubs étudiants (BDE) ?

Posez vos questions directement aux étudiant·es sur notre école et les informations utiles.

N’hésitez pas à échanger avec les normalien·nes/étudiant·es, disposé·es à répondre à vos questions : ils·elles ont aussi été primo-accédant·es !

Consultez la liste des associations étudiantes.

Santé et handicaps : à qui s'adresser ?

Le pôle médical est à votre disposition pour vous accueillir, écouter, soutenir et vous orienter.

Consultez les horaires et comment prendre rendez-vous.

Si vous rencontrez un problème de santé ponctuel ou permanent, le relais handicap peut vous aider.

Consultez la page "relais handicaps".
relais.handicap [at] ens-paris-saclay.fr (Contactez-les par mail.)

Comment retrouver les présentations de la rentrée ?

Vous trouverez toutes les informations nécessaires dans la rubrique MES ÉTUDES de l'intranet :

Une fois que vous avez votre identifiant ENS, vous pouvez vous connecter à l'intranet.

Consultez la page MES ÉTUDES

Classement de Shanghai 2025 : l'Université Paris-Saclay maintient son excellence, l'ENS Paris-Saclay fière d'y contribuer !

margaux.bobet — Tue, 19 Aug 2025 14:23:10 +0000

Shanghai Ranking 2025: Paris-Saclay University maintains its excellence, and ENS Paris-Saclay is proud to contribute to it! sylvie.kemenovic Mon, 09/01/2025 - 10:01

International recognition of academic excellence

This prestigious ranking, which annually assesses the performance of higher education institutions around the world based on criteria related to research and scientific output, once again highlights the quality and impact of the work accomplished by all members of Paris-Saclay University.

As a founding member of Paris-Saclay University, ENS Paris-Saclay is delighted with this international recognition and salutes the daily commitment of its teachers, researchers, staff, students, and alumni. Through the quality of its programs, the excellence of its research, and the richness of its academic and industrial partnerships, ENS Paris-Saclay contributes fully to this collective success.

A strengthened commitment to ambitious and open science

This performance reflects the dynamism and ambition of Paris-Saclay University, driven by a community committed to innovative, demanding, and open-minded science. ENS Paris-Saclay reaffirms its desire to actively participate in this dynamic, serving society and addressing major contemporary issues.
ARWU 2025 ranking – Paris-Saclay University:

13th worldwide
1st French university
1st in continental Europe

Resumption of studies

Media

In 2025, Paris-Saclay University maintained its position of excellence in the Academic Ranking of World Universities (ARWU), published on August 15 by ShanghaiRanking Consultancy. It climbed to 13th place worldwide, confirming its status as the top French university and leader in continental Europe.

L’ENS Paris-Saclay rend hommage à Gilles Dowek

sylvie.kemenovic — Tue, 22 Jul 2025 15:25:44 +0000

ENS Paris-Saclay honors Gilles Dowek sylvie.kemenovic Tue, 07/22/2025 - 17:32

A former student at the École polytechnique (class of 1985), researcher at Inria, member of the Laboratoire de Méthodes Formelles (LMF - CNRS, Inria, ENS Paris-Saclay, Université Paris-Saclay) and professor at ENS Paris-Saclay, Gilles Dowek has played a key role in the development of theoretical computer science at our institution.

A recognized specialist in the formalization of mathematics, logic and proof systems, throughout his career he has sought to build bridges between computer science and other fields of knowledge, placing his work in a perspective that is at once scientific, ethical and civic-minded.

His teaching, with its remarkably high intellectual standards, testified to his commitment to training students who were free, curious and responsible. He embodied with conviction the role of the professor attached to the École: a high-level researcher, fully committed to training through research, and attentive to changing the way scientific disciplines are represented.

Gilles Dowek is particularly renowned for his efforts to promote the teaching of computer science in secondary schools, by helping to design the “Computer Science and Digital Science” program, introduced in the final year of secondary school (Terminale S) at the start of the 2012 academic year, and by participating in the writing of textbooks for science preparatory classes.

He was awarded the Grand Prix Inria 2023 and the Histoire des sciences et épistémologie 2024 medal by the Académie des sciences.

His research in computer science was at the crossroads of logic, philosophy, pedagogy, epistemology and digital ethics.

ENS Paris-Saclay salutes the memory of a rigorous teacher, a committed researcher and a colleague deeply attached to the values of public service in higher education and research. His work and commitment will remain a source of inspiration for our community.

secretariat.presidence [at] ens-paris-saclay.fr (La Présidence)

École

School

LMF - the Formal Methods Laboratory

Resumption of studies

Media

It is with regret that the entire staff of the École normale supérieure Paris-Saclay has learned of the death of Gilles Dowek, which occurred on Monday, July 21, 2025.

Gilles Dowek, awarded the 2023 and 2024 medals by the French Academy of Sciences

Alain Aspect élu à l’Académie française

sylvie.kemenovic — Tue, 15 Jul 2025 16:11:18 +0000

Alain Aspect elected to the Académie française sylvie.kemenovic Thu, 07/17/2025 - 16:42

Alain Aspect was awarded the Nobel Prize in Physics in 2022. He is Director of Research Emeritus at CNRS, affiliated professor at ENS Paris-Saclay, professor at Institut d'Optique Graduate School (IOGS) and École Polytechnique.

The French Academy

Alain Aspect has been elected to the Académie française.

The Académie française is made up of 40 members, including a Secrétaire perpétuel, who represents the Company at official ceremonies. It meets in committees responsible for :

managing the Company's assets: endowments, foundations, movable and immovable property, portfolio. In this capacity, the Secrétaire perpétuel is responsible for authorizing expenditure and signing all accounting documents: salaries, prizes, bursaries, grants, subsidies, works, taxes, insurance, contracts, deeds of purchase, sale or lease concerning the assets;
writing its Dictionary: revising the Dictionary and preparing its publication;
awarding its prizes. These include the Grand Prix, the Grand Prix du Roman, the Prix de la Francophonie, the Prix de Poésie, the Prix de Littérature et de Philosophie, the Prix d'Histoire et de Sociologie, the Prix du Théâtre and the Prix du Cinéma;
examines, on a case-by-case basis, applications from large families and requests for grants.

Alain Aspect

Born in Agen in 1947, Alain Aspect entered ENSET (now ENS Paris-Saclay) in 1965. He graduated in 1969. He continued his studies at the Orsay Faculty of Science, where he conducted part of his fundamental research in quantum optics.

In 1983, he defended his state thesis and became a major figure in experimental physics, thanks in particular to his work on quantum entanglement at the Institut d'Optique d'Orsay. This research revolutionized our understanding of the quantum world and paved the way for cutting-edge technologies such as quantum cryptography and quantum computers.

Affiliated professor at ENS Paris-Saclay since 2014, Alain Aspect has also taught at Université Paris-Saclay and École Polytechnique. He is Director of Research Emeritus at the CNRS and has been a member of the Académie des Sciences since 2001.

Alain Aspect is also a member of the Académie des Sciences and the Académie des Technologies, and a foreign member of the Académie Royale des Sciences, des Lettres et des Beaux-Arts in Belgium, the Accademia Nazionale dei Lincei in Italy, the National Academy of Sciences in the USA, the Österreichische Akademie der Wissenschaften, and the Royal Society in the UK.

Awards and distinctions

2022: Nobel Prize in Physics with John F. Clauser and Anton Zeilinger for their work on quantum mechanics
2021: Honorary member of Optica
2005: CNRS Gold Medal
2013: Balzan Prize.
2013: Niels Bohr Medal to mark the centenary of the publication of Niels Bohr's atomic model.
2012: Albert-Einstein Medal.
2010: Wolf Prize in Physics, jointly with American John F. Clauser and Austrian Anton Zeilinger, for his conceptual and experimental contributions to quantum physics.
2005: CNRS gold medal.
1991: winner of the Holweck Prize in 1991.

His books

Specialist books

Introduction aux lasers et à l’optique quantique, Ellipses, 1997. Published in English by Cambridge University Press

Books for the general public

Une nouvelle révolution quantique, dans Demain, la physique, Odile Jacob, 2004.
Einstein et les révolutions quantiques, CNRS Éditions, 2019 ; publié en italien, en anglais, en chinois.
Si Einstein avait su, Odile Jacob, 2025. Traduction en cours pour une publication en versions anglaise, espagnole, italienne, chinoise, japonaise.

Honours - Awards

Student

Academic

Alain Aspect, Nobel Prize winner in physics and alumnus of the École normale supérieure Paris-Saclay, was elected to the Académie française on Thursday June 26, 2025: Commandeur de la Légion d'honneur, officier de l'ordre national du Mérite and commandeur des Palmes académiques.
Congratulations to this internationally renowned researcher!

Site Internet de l'accadémie française

Fermeture de l'École été 2025

sylvie.kemenovic — Thu, 17 Jul 2025 14:28:42 +0000

School closure summer 2025 sylvie.kemenovic Thu, 07/17/2025 - 16:32

Summer closure

ENS Paris-Saclay will be closed from the evening of Friday, July 25, 2024 to the morning of Monday, August 18 for the summer vacations.

Calendrier de la rentrée

Find the main dates for the start of the 2025/2026 school year, student events and vacations.

Find out all the dates for the start of the 2025/2026 school year.

Welcoming the families of first-time entrants to the Ecole Normale Supérieure

This year, the School is organizing a reception for the families of first-time students on Friday August 29, 2025.

See the program.

Photo credit: Michel Denancé (RPWB)

secretariat.presidence [at] ens-paris-saclay.fr (La Présidence)

Resumption of studies

L'ENS Paris-Saclay est fermée du vendredi 25 juillet 2025 au soir au lundi 18 août au matin 2025.
Nous vous souhaitons de très bonnes vacances d'été !

Calendrier de la rentrée 2025/2026

Journée d'accueil des familles 2025

Trouver un logement pour 2025/2026

sylvie.kemenovic — Fri, 25 Apr 2025 12:22:14 +0000

Finding a home for 2025/2026 sylvie.kemenovic Tue, 06/17/2025 - 13:08

Priority is given to International students enrolled for their first arrival in France.

Applying for accommodation at ENS Paris-Saclay

1. Contact us by e-mail as soon as you have been accepted.

The sooner you submit your housing application, the faster it will be processed.
A processing fee of 40 euros must be paid before your application can be processed. This fee is non-refundable.
Students receiving a grant at the time of application are exempt from this fee, upon presentation of proof of current year's funding.

2. One accommodation proposal per person to be accepted within 72 hours.

In a context where the housing market is tight, ENS Paris-Saclay undertakes to make one and only one housing offer (CROUS or Cesal) to students, normaliens-studiants and normaliens-élèves, within the limit of available places.
Interested parties are invited to respond to this offer within 72 hours.
For example: a proposal sent on Friday at 12pm is expected to be received by the student/normalien by Monday at 12pm at the latest.
If the 72-hour deadline is not met, or if no reply is received, the offer will be deemed to have been refused.

3. Please note: Cesal accommodation must be booked by August 1 at the latest (compulsory).

Rent is payable by the family from July 1st for a reservation in July, and from August 1st for a reservation in August.
Whichever date you move in, you pay the landlord from the 1st of the month.

Extend your search

Don't hesitate to contact real estate agencies in the vicinity of ENS Paris-Saclay, and check classified ads, word of mouth, etc.

Contact

Contact the team by e-mail.

École

Student

The 2025/2026 housing campaign will start in June 2025.
Places are allocated subject to availability. All students are advised to start their application as soon as possible.

See our frequently asked questions (FAQ)

Housing

Sémiosphère, l’école d’été doctorale interdisciplinaire à l’ENS Paris-Saclay

sylvie.kemenovic — Thu, 15 May 2025 07:28:15 +0000

Semiosphère, the interdisciplinary doctoral summer school at ENS Paris-Saclay sylvie.kemenovic Mon, 05/26/2025 - 14:10

PRACTICAL INFORMATION

Date: June 30 to July 04, 2025
Location: ENS Paris-Saclay - 4 avenue des Sciences - 91190 Gif-sur-Yvette - How to find us
Public: doctoral students from Université Paris-Saclay
Speakers: Centre de Recherche en Design (CRD - ENS Paris-Saclay, Ensci - Les Ateliers), Centre Borelli (ENS Paris-Saclay), Languages, teaching and English for special purposes laboratory (LEADS - ENS Paris-Saclay) and Estonian association of architects (EEA).

How to apply
Apply by e-mail before May 30, 2025, submitting a one-page article (500 words - pdf format) and a short biographical note (250 words maximum).
contact [at] surfutures.eu (Send your application)

Semiosphere, questioning language in design processes

The practice of design is undergoing rapid evolution thanks to the rise of various forms of artificial intelligence (AI). These tools have the potential to radically reshape the discipline, from replacing traditional methods such as drawing and prototyping to the ability to model complex systems.

As technology redefines creative practice and design communication, it's essential to critically assess its strengths and implications.
With Artificial Intelligence (AI) and Information and Communication Technologies (ICT) challenging ethical, political and economic values, this summer school will bring together researchers from different disciplines to explore new collaborative approaches, combining human insight with technological potential.

More information on the “surfutures.eu” website.

contact [at] surfutures.eu (Surfutures)

Publications

Education

CRD - Design Research Centre

Student

Academic

Media

From June 30 to July 4, 2025, the Centre de Recherche en Design (ENS Paris-Saclay / ENSCI - Les Ateliers), LEADS and the Centre Borelli of ENS Paris-Saclay are organizing the Interdisciplinary PHD Summer School Semiosphère on language and AI in design processes.
Submit your application by May 30!

Site Internet Surfutures

Bienvenue aux candidats admissibles 2025

lydie.varacavoudin — Tue, 20 May 2025 08:03:36 +0000

Welcome to 2025 eligible candidates sylvie.kemenovic Thu, 05/22/2025 - 16:52

CALENDAR OF ADMISSION TESTS

You have received an invitation e-mail specifying the days of your tests. You can also consult the calendars on the competition pages according to your discipline and type of competition:

Where to go on the day of your tests?

ENS Paris-Saclay is located in Gif-sur-Yvette, on the Saclay plateau:
4, avenue des Sciences
91190 Gif-sur-Yvette (Essonne)
Coming to ENS Paris-Saclay.

In front of the main entrance

Follow the signs to the meeting point in room MU45

Go to the meeting point located in the North building, on the “Mezzanine” level, in room MU45, where you will be welcomed by the École Contest department, who will guide you through your oral exams and answer any questions you may have.

The room is located opposite reception, across the garden.

Where can I leave my luggage?

You can leave your luggage in the candidate area, room MU45, signposted within ENS Paris-Saclay..

Contact the student office (BDE) ?

Visit

You can talk to the Bureau des étudiants (BDE), always ready to answer all your questions, in their relaxation area, the Kokarde (Kfet), on the first floor of the East building.

The BDE's schedule of meetings and activities is posted in the MU45 room and on their social networks.

BDE social networks

Got a question? You can chat with the ENS Paris-Saclay student community via our social networks:

Don't hesitate to invite your fellow students to these networks, so that they can keep up to date with all the news and chat with the student community!

Wifi

You'll find the Wifi code (login and password) in your e-mail invitation.

Local food and accommodation

Accommodation for competitive entrance exams and short stays: CROUS offers low-cost short stays for students.

Consult the platform BED&CROUS

If you have difficulties finding accommodation, contact the BDE via their account Instagram : @bde2025_ensps

Eating

You can eat at the CROUS (payment by credit card only) or at the Kfé de l'École, on the first floor of the South West building. You'll need your student card to benefit from the student rate.
You'll also find a bakery, various restaurants and a supermarket within a 5-minute walk of our building, rue Mail Pierre Potier

Consult our guides and documents

The “5 good reasons to join ENS Paris-Saclay” brochure

Download the brochure.

Le guide du routard

Every year, the BDE publishes a guide for new students. Feel free to download this guide (PDF format)
Download the backpacker's guide (large PDF file).

School life posters

Students will be handing out various brochures and maps of the École and the Paris-Saclay campus.

Welcome to ENS Paris-Saclay and good luck for your orals!

ENS Paris-Saclay - @ Credits photo: Michel Denace (RPWB)

concours [at] ens-paris-saclay.fr (Service Concours)

Entrance examination

Admission

Student

Welcome to the oral exams for the ENS Paris-Saclay entrance exams, which run from Monday, May 26 to Saturday, July 12, 2025.
Here you'll find all the practical information you need to take your orals with peace of mind: how to get to the school, how to find your way around the building to find the meeting point with the Competitive Entrance Examinations department and its test rooms, how to talk to students, how to find accommodation and meals...