Angular dependence of the Wigner time delay upon tunnel ionization of H2

When a very strong light field is applied to a molecule an electron can be ejected by tunneling. In order to quantify the time-resolved dynamics of this ionization process, the concept of the Wigner time delay can be used. The properties of this process can depend on the tunneling direction relative to the molecular axis. Here, we show experimental and theoretical data on the Wigner time delay for tunnel ionization of H2 molecules and demonstrate its dependence on the emission direction of the electron with respect to the molecular axis. We find, that the observed changes in the Wigner time delay can be quantitatively explained by elongated/shortened travel paths of the emitted electrons, which occur due to spatial shifts of the electrons’ birth positions after tunneling. Our work provides therefore an intuitive perspective towards the Wigner time delay in strong-field ionization.

Metadaten
Author:	Daniel Trabert ORCiD GND, Simon Brennecke ORCiD, Kilian Fehre ORCiD GND, Nils Anders ORCiD, Angelina Geyer ORCiD, Sven Eric Grundmann ORCiD GND, Markus S. Schöffler ORCiD GND, Lothar Schmidt GND, Till Jahnke ORCiD GND, Reinhard Dörner ORCiD GND, Maksim Kunitski ORCiD GND, Sebastian Gereon Eckart ORCiD GND
URN:	urn:nbn:de:hebis:30:3-636472
DOI:	https://doi.org/10.1038/s41467-021-21845-6
ISSN:	2041-1723
Parent Title (English):	Nature Communications
Publisher:	Nature Publishing Group UK
Place of publication:	[London]
Document Type:	Article
Language:	English
Date of Publication (online):	2021/03/16
Date of first Publication:	2021/03/16
Publishing Institution:	Universitätsbibliothek Johann Christian Senckenberg
Release Date:	2022/08/23
Tag:	Atomic and molecular interactions with photons; Attosecond science
Volume:	12.2021
Article Number:	1697
Page Number:	10
First Page:	1
Last Page:	10
Note:	This work was funded by the German Research Foundation (DFG) through priority programme SPP 1840 QUTIF. Open Access funding enabled and organized by Projekt DEAL.
HeBIS-PPN:	505142317
Institutes:	Physik
Dewey Decimal Classification:	5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:	Universitätspublikationen
Licence (German):	Creative Commons - Namensnennung 4.0

Open Access