Bond-length dependence of attosecond ionization delays in O$_{2}$ arising from electron correlation to a shape resonance
OPEN ACCESS
Loading...
Author / Producer
Date
2024-03-29
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Rights / License
Abstract
We experimentally and theoretically demonstrate that electron correlation can cause the bond-length sensitivity of a shape resonance to induce an unexpected vibrational state–dependent ionization delay in a nonresonant channel. This discovery was enabled by a high-resolution attosecond-interferometry experiment based on a 400-nm driving and dressing wavelength. The short-wavelength driver results in a 6.2–electron volt separation between harmonics, markedly reducing the spectral overlap in the measured interferogram. We demonstrate the promise of this method on O2, a system characterized by broad vibrational progressions and a dense photoelectron spectrum. We measure a 40-attosecond variation of the photoionization delays over the X2Πg vibrational progression. Multichannel calculations show that this variation originates from a strong bond-length dependence of the energetic position of a shape resonance in the b4Σg− channel, which translates to the observed effects through electron correlation. The unprecedented energy resolution and delay accuracies demonstrate the promise of visible-light–driven molecular attosecond interferometry.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
10 (13)
Pages / Article No.
Publisher
AAAS
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Organisational unit
03888 - Wörner, Hans Jakob / Wörner, Hans Jakob