SKM 2023 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 75: Focus Session: Ultrafast Dynamics in Nanostructures I

Donnerstag, 30. März 2023, 10:30–13:15, GER 38

In nanostructures, the response of electrons and atoms to external stimuli often differs significantly from that of their bulk counterparts due to spatial confinement and greatly increased surface-to-volume ratios. Whereas pump-probe techniques provide real time access to the dynamics of nanostructures in excited states, investigating the response of single nanostructures and probing their dynamics locally requires ultrafast imaging techniques that provide simultaneously a high spatial and temporal resolution.

Several ultrafast nanoscale imaging methodologies have made a tremendous progress in recent years. Crucial instrumental developments have enabled time-resolved variants of scanning probe techniques, such as ultrafast scanning near-field optical microscopy and ultrafast scanning tunneling microscopy. Furthermore, bright sources for femtosecond electron as well as extreme ultraviolet and x-ray pulses now allow for the ultrafast far-field probing with nanometer resolution.

To highlight these recent developments, this focus session brings together researchers interested in ultrafast nanoscale science and in the development of ultrafast high-resolution imaging approaches.

Organizers: Melanie Müller (FHI Berlin) and Sascha Schäfer (U Regensburg)

	10:30	O 75.1	Topical Talk: Ultrafast nano-imaging: probing quantum dynamics in space and time — •Markus Raschke
	11:00	O 75.2	The contribution has been withdrawn.
	11:15	O 75.3	Ultrafast electron dynamics in semiconductor nanowires — •Jan Vogelsang, Lukas Wittenbecher, Cord L. Arnold, Anne L'Huillier, and Anders Mikkelsen
	11:30	O 75.4	SPP induced coherent electronic excitations investigated by Time- and Angle-Resolved Plasmoemission-Spectroscopy on Cs/Au(111) — •Alexander Neuhaus, Pascal Dreher, David Janoschka, Michael Horn-von Hoegen, and Frank-J. Meyer zu Heringdorf
	11:45	O 75.5	Topical Talk: Lightwave-driven scanning tunneling microscopy and spectroscopy at the atomic scale — •Vedran Jelic, Spencer E. Ammerman, Yajing Wei, Vivian N. Breslin, Mohammed Hassan, Nathan Everett, Sheng Lee, Stephanie Adams, Trevor Hickle, Kaedon Cleland-Host, Qiang Sun, Carlo A. Pignedoli, Pascal Ruffieux, Roman Fasel, and Tyler L. Cocker
	12:15	O 75.6	Probing hot electron dynamics in a metal nanotip with THz-STM — •Vivien Sleziona, Faruk Krecinic, Natalia Martín Sabanés, Fabian Schulz, Takashi Kumagai, Martin Wolf, and Melanie Müller
	12:30	O 75.7	Spin current control by hybrid pulses — •Jyoti Krishna, Sangeeta Sharma, Julen Ibañez-Azpiroz, and Sam Shallcross
	12:45	O 75.8	Mode-selective ballistic pathway to a metastable electronic phase — •Hannes Böckmann, Jan Gerrit Horstmann, Felix Kurtz, Abdus Samad Razzaq, Stefan Wippermann, and Claus Ropers
	13:00	O 75.9	Nanoscale coherent phonon excitation via plasmon-matter interaction in ultrathin ZnO films — •H. Wiedenhaupt, S. Liu, L. Parra López, A. Hammud, I. Hamada, F. Schulz, M. Wolf, T. Kumagai, and M. Müller