Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M02: Attosecond pulses and attosecond dynamics
2:00 PM–4:00 PM,
Wednesday, June 2, 2021
Chair: Guillaume Laurent, Auburn University
Abstract: M02.00008 : Attosecond spectroscopy of size-resolved water clusters*
3:24 PM–3:36 PM
Live
Presenter:
Saijoscha Heck
(ETH Zuerich)
Authors:
Saijoscha Heck
(ETH Zuerich)
Xiaochun Gong
(East China Normal University)
Denis Jelovina
(ETH Zuerich)
Conaill Perry
(ETH Zuerich)
kristina zinchenko
(ETH Zuerich)
Hans Jakob Woerner
(ETH Zurich)
Collaborations:
Xiaochun Gong, Denis Jelovina, Conaill Perry, Kristina Zinchenko, Hans Jakob Woerner
but their real-time study has so far remained limited to the femtosecond time scale. Here,
we introduce attosecond size-resolved cluster spectroscopy and build up a molecular-level
understanding of the attosecond electron dynamics in water. We measure the effect that the
addition of single water molecules has on the photoionization time delays of water clusters.
We find a continuous increase of the delay for clusters containing up to 4-5 molecules and
little change towards larger clusters. We show that these delays directly reflect the spatial extension
of the created electron hole, which first increases with cluster size and then partially
localizes through the onset of structural disorder that is characteristic of large clusters and
bulk liquid water. These results establish a previously unknown sensitivity of photoionization
delays to electron-hole delocalization and reveal a direct link from electronic structure
to attosecond photoemission dynamics. Our results also bridge the technological, theoretical
and conceptual gaps between gas-phase and liquid-phase attosecond spectroscopies.
*We gratefully acknowledge funding from an ERC Consolidator Grant (Project No. 772797-ATTOLIQ), and project200021 172946 as well as the NCCR-MUST, funding instruments of the Swiss National Science Foundation.D. J. thanks the FP-RESOMUS program for a fellowship. The results have been obtained on the ETHZurich Euler cluster and the NCCR-Cluster supercomputer.
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