With the financial support of

The goal of this project is to measure the electronic states in condensed matter out of equilibrium conditions. This objective is achieved by means of a the natural extension of Angle Resolved Photoelectron Spectroscopy (ARPES) to the investigation of photoexcited systems. In ARPES measurements, a photon beam induces the emission of electrons from a solid surface. The band structure of a crystalline solid is reconstructed by analyzing the emission angle and the kinetic energy of the photoemitted electrons. In the case of time resolved photoelectron spectroscopy, a pump pulse is absorbed by the surface, therefore creating a non equilibrium state. A second pulse in the ultraviolet spectral range probes the photoexicted state via the photoemission process. This technique provides instantaneous photographs of the electronic states with temporal resolution better than 100 fs. The dynamics of the electronic states is obtained by changing the temporal delay between the pump and probe pulse.

FEMTOARPES Facility

Members

Laboratoire des Solides Irradiés (LSI):
Luca Perfetti (Professor, Ecole Polytechnique)
e-mail: Nous contacter
Tel. Polytechnique: +33 (0)1 6933 4556
Tel. Soleil: +33 (0)1 6935 9671

Laboratoire de Physique des Solides d'Orsay (LPS):
Marino Marsi (Professor, Université d'Orsay)
Evangelos Papalazarou (Assistant Professor, Université d'Orsay)

Collaborations

Davide Boschetto, Ultrafast optical spectroscopy
Amina Taleb, Angle Resolved Photoelectron Spectroscopy
Javier Villegas and Henri Jaffres, Spintronic emitters 

Research

The interaction of photons with condensed matter is one of the oldest and broadest subjects of physics. Albeit most of the experiments are performed in equilibrium conditions, new horizons of condensed matter physics can be explored when a strong perturbation drives the system into a highly excited state. By time resolved photoelectron spectroscopy we have direct access to the electronic states during the photoexcitation and relaxation process. This window in the time domain offers new insights on the electrons dynamics in topological insulators, high temperature superconductors and many other exotic systems.

Recent research subjects are:

• Spin-orbit coupling
• Topological insulators
• Coherent phonons
• 2D materials
• Hybrid Perovskites
• Superconductors

Recent publications

Electronic dispersion, correlations and stacking in the photoexcited state of 1T-TaS2, Jingwei Dong, Dongbin Shin, Ernest Pastor, Tobias Ritschel, Laurent Cario, Zhesheng Chen, Weiyan Qi, Romain Grasset, Marino Marsi, Amina Taleb-Ibrahimi, Noejung Park, Angel Rubio, Luca Perfetti, Evangelos Papalazarou, 2D Materials 4, 045001 (2023).

Manipulating Dirac States in BaNiS2 by Surface Charge Doping}, Jiuxiang Zhang, Thibault Daniel Pierre Sohier, Michele Casula, Zhesheng Chen, Jonathan Caillaux, Evangelos Papalazarou, Luca Perfetti, Luca Petaccia, Azzedine Bendounan, Amina Taleb-Ibrahimi, David Santos-Cottin, Yannick Klein, Andrea Gauzzi, Marino Marsi, Nano Letters 23, 1830 (2023).

Combining two-photon photoemission and transient absorption spectroscopy to resolve hot carrier cooling in 2D perovskite single crystals: the effect of surface layer}, Weihua Lin, Mingli Liang, Yuran Niu, Zhesheng Chen, Marie Cherasse, Jie Meng, Xianshao Zou, Qian Zhao, Huifang Geng, Evangelos Papalazarou, Marino Marsi, Luca Perfetti, Sophie E. Canton, Kaibo Zheng, T\"onu Pullerits, Journal of Materials Chemistry C 10, 16751 (2022).

Electron Dynamics in Hybrid Perovskites Reveal the Role of Organic Cations on the Screening of Local Charges},
Marie Cherasse, Jingwei Dong, Gaëlle Trippé-Allard, Emmanuelle Deleporte, Damien Garrot, Sebastian F. Maehrlein, Martin Wolf, Zhesheng Chen, Evangelos Papalazarou, Marino Marsi, Jean-Pascal Rueff, Amina Taleb-Ibrahimi, and L. Perfetti, Nano Letters 22, 2065 (2022).

Moving Dirac nodes by chemical substitution, Niloufar Nilforoushan, Michele Casula, Adriano Amaricci, Marco Caputo, Jonathan Caillaux, Lama Khalil, Evangelos Papalazarou, Pascal Simon, Luca Perfetti, Ivana Vobornik, Pranab Kumar Das, Jun Fujii, Alexei Barinov, David Santos-Cottin, Yannick Klein, Michele Fabrizio, Andrea Gauzzi, Marino Marsi, Proceedings of the National Academy of Sciences 118, e2108617118 (2021).

Spin injection efficiency at metallic interfaces probed by THz emission spectroscopy, Jacques Hawecker, Thi‐Huong Dang, Enzo Rongione, James Boust, Sophie Collin, Jean‐Marie George, Henri‐Jean Drouhin, Yannis Laplace, Romain Grasset, Jingwei Dong, Juliette Mangeney, Jerome Tignon, Henri Jaffrès, Luca Perfetti, Sukhdeep Dhillon, Advanced Optical Materials 2100412 (2021).