Mainz 2026 – scientific programme

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MO: Fachverband Molekülphysik

MO 16: Poster – Attosecond Physics (joint session A/MO)

MO 16.5: Poster

Wednesday, March 4, 2026, 17:00–19:00, Philo 1. OG

Attosecond Streaking Spectroscopy: From Gas-Phase Dynamics to Adsorbed Molecules — •Ron Ducke, Sven-Joachim Paul, Maximilian Pollanka, Christian Schröder, Pascal Freisinger, Andreas Duensing, Reinhard Kienberger, and Maximilian Forster — Technische Universität München, Garching, Germany

We present the attosecond streaking setup established in our laboratory, designed to investigate time-resolved photoemission dynamics with high temporal precision. By using attosecond pulses, generated by HHG, we successfully determined absolute photoemission delays across a broad range of systems. In the gas phase, we review key results including absolute delays in the valence range of water and comparative studies of isosteric molecules, which elucidate the link between electronic structure and emission timing. Furthermore, a systematic analysis of iodoalkanes reveals the significant influence of the molecular environment on the emission from the iodine atom. Moving beyond the gas state, we discuss the photoemission delays of molecules adsorbed on crystal surfaces. Investigations of iodomethane and iodoethane on Pt(111) demonstrate how molecular orientation and surface interactions affect the measured delays compared to the gas phase. Finally, we present an outlook on our current measurements regarding e.g. Xenon and Neon.

Keywords: Attosecond Streaking Spectroscopy; Absolute Photoemission Time Delays; Adsorbed Molecules; Gas Phase Dynamics