Measuring decoherence and entanglement in attosecond photoemission

Sujet détaillé

Recently, the generation of attosecond pulses (1 as=10−18 s) has allowed the exploration of matter at the electron intrinsic timescale, and was awarded the 2023 Nobel Prize in Physics [1]. These ultrashort pulses are generated from the strong nonlinear interaction of short intense laser pulses with gas jets [2]. A new laser technology based on Ytterbium is allowing an increase in average power/reprate of more than one order of magnitude as compared to the current Titanium:Sapphire technology. This opens new prospects for attosecond spectroscopy, e.g., studying in real time the quantum process of photoemission, shooting the 3D movie of electronic wavepacket ejection [3,4], and studying quantum decoherence resulting from electron-ion entanglement [5].

The experimental work will include the development and operation of a setup installed on the ATTOLab laser platform allowing: i) the generation of attosecond XUV pulses from a new Ytterbium laser, ii) their characterization using quantum interferometry, iii) their use in photoemission spectroscopy. The student will be trained in ultrafast optics, atomic and molecular physics, quantum optics and will acquire a good mastery of charged particle spectrometry.

The internship will be continued by a PhD project in the frame of a recently funded European Network QU-ATTO (https://quatto.eu/), opening many opportunities of joint work with European laboratories. Due to the Mobility Rule, candidates must not have resided (work, studies) in France for more than 12 months since August 2022.

1. https://www.nobelprize.org/prizes/physics/2023/summary/
2. Attosecond synchronization of high-harmonic soft X-rays
   Y. Mairesse, A. de Bohan, L. J. Frasinski, H. Merdji, L. C. Dinu, P. Monchicourt, P. Breger, M. Kovačev, R. Taïeb, B. Carré, H. G. Muller, P. Agostini, and P. Salières, Science 302 (2003) 1540.
3. Attosecond dynamics through a Fano resonance: Monitoring the birth of a photoelectron
   V. Gruson, L. Barreau, Á. Jiménez-Galan, F. Risoud, J. Caillat, A. Maquet, B. Carré, F. Lepetit, J.-F. Hergott, T. Ruchon, L. Argenti, R. Taïeb, F. Martín , and P. Salières, Science 354 (2016) 734.
4. Anisotropic dynamics of two-photon ionization: An attosecond movie of photoemission
   Alice Autuori, Dominique Platzer, Mariusz Lejman, Guillaume Gallician, Lucie Maëder, Antoine Covolo, Lea Bosse, Malay Dalui, David Bresteau, Jean-François Hergott, Olivier Tcherbakoff, Hugo J. B. Marroux, Vincent Loriot, Franck Lépine, Lionel Poisson, Richard Taïeb, Jérémie Caillat, and Pascal Salières, Science Advances 8 (2022) eabl7594.
5. Quantifying decoherence in attosecond metrology
   C. Bourassin-Bouchet, L. Barreau, V. Gruson, J.-F. Hergott, F. Quéré, P. Salières, and T. Ruchon, PRX 10 (2020) 031048.

Lieu du stage

CEA Saclay, Site de l’Orme des merisiers, 91 Essonne, France

Conditions de stage

• Durée du stage : 5 mois
• Niveau d’étude requis : Bac+5
• Formation : Master 2
• Poursuite possible en thèse : Oui
• Date limite de candidature : 2 janvier 2025

Méthodes, techniques :

• Generation of high-order harmonics of intense laser beams
• Characterization of ultrashort laser pulses
• Spectroscopy of charged particles
• Vacuum technology

Langages informatiques et logiciels : Python

Responsable du stage

Pascal SALIERES
Tél. : 0169086339
Email :

Responsable

Pascal SALIERES
Tél. : 0169086339