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Attosecond Delays in Molecular Photoionization
Open accessAbstract
We report measurements of energy-dependent photoionization delays between the two outermost valence shells of N_{2}O and H_{2}O. The combination of single-shot signal referencing with the use of different metal foils to filter the attosecond pulse train enables us to extract delays from congested spectra. Remarkably large delays up to 160 as are observed in N_{2}O, whereas the delays in H_{2}O are all smaller than 50 as in the photon-energy range of 20-40 eV. These results are interpreted by developing a theory of molecular photoionization delays. The long delays measured in N_{2}O are shown to reflect the population of molecular shape resonances that trap the photoelectron for a duration of up to ∼110 as. The unstructured continua of H_{2}O result in much smaller delays at the same photon energies. Our experimental and theoretical methods make the study of molecular attosecond photoionization dynamics accessible.
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“Most recently, attosecond photoionization delays have been measured in molecules [200] and highharmonic spectroscopy has been developed further to reconstruct charge migration in spatially oriented molecules on attosecond timescales [171].”
From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [200]
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Metadata
- Authors
- Huppert, M., Jordan, I., Baykusheva, D., von Conta, A., & Wörner, H. J.
- Affiliations
- ETH Zurich (CH)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2016-08-22
- Volume
- 117
- Issue
- 9
- Pages
- 093001-093001
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2508703147
- Cited by
- 283
- References
- 45
- Citations by year
- 2026: 17 · 2025: 37 · 2024: 35 · 2023: 25 · 2022: 31 · 2021: 27 · 2020: 36 · 2019: 22 · 2018: 28 · 2017: 22 · 2016: 2
- FWCI
- 11.66
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- European Research Council (307270-ATTOSCOPE)
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- NCCR-MUST
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Atomic and Molecular Physics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
- Keywords
- molecular photoionization, N2O, water, shape resonances, photoelectron trapping, photoionization dynamics
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