Nonlinear coherence effects in transient-absorption ion spectroscopy with stochastic extreme-ultraviolet free-electron laser pulses

• Main Authors: Ding, Thomas, Rebholz, Marc, Aufleger, Lennart, Hartmann, Maximilian, Meyer, Kristina, Stooß, Veit, Magunia, Alexander, Wachs, David, Birk, Paul, Mi, Yonghao, Borisova, Gergana Dimitrova, da Costa Castanheira, Carina, Rupprecht, Patrick, Loh, Zhi Heng, Attar, Andrew R., Gaumnitz, Thomas, Roling, Sebastian, Butz, Marco, Zacharias, Helmut, Düsterer, Stefan, Treusch, Rolf, Cavaletto, Stefano Michele, Ott, Christian, Pfeifer, Thomas
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2020
• Subjects: Science::Chemistry; Strong Electromagnetic Field Effects; Ultrafast Phenomena
• Online Access: https://hdl.handle.net/10356/141913
• Institution: Nanyang Technological University

We demonstrate time-resolved nonlinear extreme-ultraviolet absorption spectroscopy on multiply charged ions, here applied to the doubly charged neon ion, driven by a phase-locked sequence of two intense free-electron laser pulses. Absorption signatures of resonance lines due to 2p-3d bound-bound tra...