Strong-field extreme-ultraviolet dressing of atomic double excitation

• Main Authors: Ott, Christian, Aufleger, Lennart, Ding, Thomas, Rebholz, Marc, Magunia, Alexander, Hartmann, Maximilian, Stooß, Veit, Wachs, David, Birk, Paul, Borisova, Gergana Dimitrova, Meyer, Kristina, Rupprecht, Patrick, da Costa Castanheira, Carina, Moshammer, Robert, Attar, Andrew R., Gaumnitz, Thomas, Loh, Zhi Heng, Düsterer, Stefan, Treusch, Rolf, Ullrich, Joachim, Jiang, Yuhai, Meyer, Michael, Lambropoulos, Peter, Pfeifer, Thomas
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2020
• Subjects: Science::Physics; Autoionization & Auger proesses; Stark Effect
• Online Access: https://hdl.handle.net/10356/141912
• Institution: Nanyang Technological University

We report on the experimental observation of a strong-field dressing of an autoionizing two-electron state in helium with intense extreme-ultraviolet laser pulses from a free-electron laser. The asymmetric Fano line shape of this transition is spectrally resolved, and we observe modifications of the...