Abstract

In their synergy project “Photoemission Orbital Cinematography: An ultrafast wave function lab” kicked-off in July 2023, the organizers of this mini-symposium have joined forces to enable ultrafast slow-motion imaging of molecular orbitals. With a resolution from femto- to attoseconds, the projects aims at videotaping the formation and breaking of bonds, watching charge transfer processes at surfaces or the motion of electronic wavepackets inside molecules. To date, the combinaton of photoemission orbital tomography (POT) with a momentum microscope, time resolved POT (trPOT) has already allowed for surface-based orbital videography capable of monitoring the charge-transfer dynamics across molecular interfaces [1-3]. Moreover, by merging lightwave electronics with ultrafast photoelectron momentum imaging, sub-cycle band structure movies of lightwave-accelerated electrons on a surface have become possible [4]. 

With this mini-symposium, we aim to provide a platform for the community working on timeresolved photoelectron momentum microscopy to exchange ideas, methods, and perspectives. At the same time, the symposium will serve as a milestone event for the “Orbital Cinema” consortium at about half-time of the project’s duration. We invite contributions from researchers pursuing related approaches and applications, both experimentally and theoretically, and we look forward to presenting and discussing the first major results of Orbital Cinema in the broader context of advancing ultrafast orbital imaging.

REFERENCES (up to four key references of the field ) 

[1] Wallauer, R.; Raths, M.; Stallberg, K.; Münster, L.; Brandstetter, D.; Yang, X.; Güdde, J.; Puschnig, P.; Soubatch, S.; Kumpf, C.; Bocquet, F. C.; Tautz, F. S. & Höfer, U., Tracing orbital images on ultrafast time scales, Science 371, 1056-1059 (2021) https://doi.org/10.1126/science.abf3286

[2] Neef, A.; Beaulieu, S.; Hammer, S.; Dong, S.; Maklar, J.; Pincelli, T.; Xian, R. P.; Wolf, M.; Rettig, L.; Pflaum, J. & Ernstorfer, R., Orbital-resolved observation of singlet fission, Nature 616, 275-279 (2023) https://doi.org/10.1038/s41586-023-05814-1

[3] Bennecke, W.; Windischbacher, A.; Schmitt, D.; Bange, J. P.; Hemm, R.; Kern, C. S.; D’Avino, G.; Blase, X.; Steil, D.; Steil, S.; Aeschlimann, M.; Stadtmüller, B.; Reutzel, M.; Puschnig, P.; Jansen, G. S. M. & Mathias, S. Disentangling the multiorbital contributions of excitons by photoemission exciton tomography, Nature Communications 15, 1804 (2024) https://doi.org/10.1038/s41467-024-45973-x

[4] Ito, S.; Schüler, M.; Meierhofer, M.; Schlauderer, S.; Freudenstein, J.; Reimann, J.; Afanasiev, D.; Kokh, K. A.; Tereshchenko, O. E.; Güdde, J.; Sentef, M. A.; Höfer, U. & Huber, R. Build-up and dephasing of Floquet-Bloch bands on subcycle timescales, Nature 616, 696 (2023) doi.org/10.1038/s41586-023-05850-x

 

Invited speakers

• Wiebke Bennecke (Georg-August Universität Göttingen)
• F. Stefan Tautz (Forschungszentrum Jülich)

Organizers

Name	Affiliation
Peter Puschnig	Institut für Physik, Universität Graz
Ulrich Höfer	Institut für Experimentelle und Angewandte Physik, Universität Regensburg
Rupert Huber	Institut für Experimentelle und Angewandte Physik, Universität Regensburg