All day
Place: ICFO Auditorium
Peter Baum (University of Konstanz)
Biography:
Peter Baum is a professor of physics at University of Konstanz, Germany. He received his PhD in 2005 from Ludwig-Maximilians-Universität München, worked as a postdoctoral scholar with Prof. Zewail at Caltech and was a junior group leader with Prof. Krausz at the Max-Planck-Institute of Quantum Optics. His current research in Konstanz focuses on the interaction of light and matter at ultimately small dimensions of space and time, using electron pulses under light-cycle control. In his spare time, he listens to metal music and goes skiing, swimming or surfing.
INVITED TALK: "Seeing atoms and electrons in space and time"
The fundamental reason behind almost any light-matter interaction are atomic and electronic motions in space and time. In order to provide a movie-like access to such dynamics, we unify electron microscopy with attosecond and femtosecond laser technology. In this way, we combine the awesome spatial resolution of modern electron beams with the spectacular time resolution that is offered by the cycle period of light [1-2]. Selected results will be reported on the electric fields within metamaterials [2-3], the Einstein-de-Haas effect on atomic dimensions [4], the reaction path of phase transitions [5] and the formation of free-electron qubit states [6]. Many breakthroughs in science and technology have been achieved by novel imaging techniques, and we will discuss how our ultrafast electron microscopy may contribute.
[1] D. Nabben, J. Kuttruff, L. Stolz, A. Ryabov, P. Baum, "Attosecond electron microscopy of sub-cycle optical dynamics“, Nature (2023).
[2] C. Kealhofer, W. Schneider, D. Ehberger, A. Ryabov, F. Krausz, P. Baum, “All-optical control and metrology of electron pulses”, Science 352, 429 (2016).
[3] A. Ryabov and P. Baum, “Electron microscopy of electromagnetic waveforms”, Science 353, 374 (2016).
[4] S. R. Tauchert, M. Volkov, D. Ehberger, D. Kazenwadel, M. Evers, H. Lange, A. Donges, A. Book, W. Kreuzpaintner, U. Nowak, P. Baum, “Polarized phonons carry angular momentum in femtosecond demagnetization”, Nature 602, 73 (2022).
[5] P. Baum, Ding-Shyue Yang, A. H. Zewail, “4D Visualization of Transitional Structures in Phase Transformations by Electron Diffraction”, Science 318, 788 (2007).
[6] M. Tsarev, A. Ryabov, P. Baum, “Free-Electron Qubits and Maximum-Contrast Attosecond Pulses via Temporal Talbot Revivals”, Phys. Rev. Res. 3, 043033 (2021).
All day
Place: ICFO Auditorium
Peter Baum (University of Konstanz)
Biography:
Peter Baum is a professor of physics at University of Konstanz, Germany. He received his PhD in 2005 from Ludwig-Maximilians-Universität München, worked as a postdoctoral scholar with Prof. Zewail at Caltech and was a junior group leader with Prof. Krausz at the Max-Planck-Institute of Quantum Optics. His current research in Konstanz focuses on the interaction of light and matter at ultimately small dimensions of space and time, using electron pulses under light-cycle control. In his spare time, he listens to metal music and goes skiing, swimming or surfing.
INVITED TALK: "Seeing atoms and electrons in space and time"
The fundamental reason behind almost any light-matter interaction are atomic and electronic motions in space and time. In order to provide a movie-like access to such dynamics, we unify electron microscopy with attosecond and femtosecond laser technology. In this way, we combine the awesome spatial resolution of modern electron beams with the spectacular time resolution that is offered by the cycle period of light [1-2]. Selected results will be reported on the electric fields within metamaterials [2-3], the Einstein-de-Haas effect on atomic dimensions [4], the reaction path of phase transitions [5] and the formation of free-electron qubit states [6]. Many breakthroughs in science and technology have been achieved by novel imaging techniques, and we will discuss how our ultrafast electron microscopy may contribute.
[1] D. Nabben, J. Kuttruff, L. Stolz, A. Ryabov, P. Baum, "Attosecond electron microscopy of sub-cycle optical dynamics“, Nature (2023).
[2] C. Kealhofer, W. Schneider, D. Ehberger, A. Ryabov, F. Krausz, P. Baum, “All-optical control and metrology of electron pulses”, Science 352, 429 (2016).
[3] A. Ryabov and P. Baum, “Electron microscopy of electromagnetic waveforms”, Science 353, 374 (2016).
[4] S. R. Tauchert, M. Volkov, D. Ehberger, D. Kazenwadel, M. Evers, H. Lange, A. Donges, A. Book, W. Kreuzpaintner, U. Nowak, P. Baum, “Polarized phonons carry angular momentum in femtosecond demagnetization”, Nature 602, 73 (2022).
[5] P. Baum, Ding-Shyue Yang, A. H. Zewail, “4D Visualization of Transitional Structures in Phase Transformations by Electron Diffraction”, Science 318, 788 (2007).
[6] M. Tsarev, A. Ryabov, P. Baum, “Free-Electron Qubits and Maximum-Contrast Attosecond Pulses via Temporal Talbot Revivals”, Phys. Rev. Res. 3, 043033 (2021).