Cited by 165Laser-Matter Interactions and ApplicationsSpectroscopy and Quantum Chemical StudiesPhotochemistry and Electron Transfer Studies

Catching Conical Intersections in the Act: Monitoring Transient Electronic Coherences by Attosecond Stimulated X-Ray Raman Signals

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Kowalewski, Markus, Bennett, Kochise, Dorfman, Konstantin E., Mukamel, Shaul·2015·Physical Review Letters

Abstract

Conical intersections (CIs) dominate the pathways and outcomes of virtually all photophysical and photochemical molecular processes. Despite extensive experimental and theoretical effort, CIs have not been directly observed yet and the experimental evidence is being inferred from fast reaction rates and some vibrational signatures. We show that short x-ray (rather than optical) pulses can directly detect the passage through a CI with the adequate temporal and spectral sensitivity. The technique is based on a coherent Raman process that employs a composite femtosecond or attosecond x-ray pulse to detect the electronic coherences (rather than populations) that are generated as the system passes through the CI.

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Crossref · 10.1103/physrevlett.115.193003

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  • At conical intersections, the energy splitting of the electronic states involved in the coherence can be read from the Raman shift, and the coherent oscillation period reveals this time-dependent level splitting averaged over the nuclear wavepacket.

    “At conical intersections, the energy splitting of the electronic states involved in the coherence can be read from the Raman shift and the coherent oscillation period reveals this time-dependent level splitting averaged over the nuclear wavepacket [43].”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [43]

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  1. [6]M. Barbatti, A. J. A. Aquino, J. J. Szymczak, D. Nachtigallov´ a, P. Hobza, and H. Lischka, Proc. Natl. Acad. Sci. USA 107 , 21453 (2010).

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Authors
Kowalewski, M., Bennett, K., Dorfman, K. E., & Mukamel, S.
Affiliations
University of California, Irvine (US)
Venue
Physical Review Letters
Published
2015-11-05
Volume
115
Issue
19
Pages
193003-193003
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2180431983
Cited by
165
References
47
Citations by year
2026: 6 · 2025: 13 · 2024: 16 · 2023: 18 · 2022: 23 · 2021: 22 · 2020: 14 · 2019: 13 · 2018: 10 · 2017: 15 · 2016: 14 · 2015: 1
FWCI
6.78
Type
journal article
Language
en
Open access
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • U.S. Department of Energy (DE-FG02-04ER15571)
  • National Science Foundation (CHE-1361516)
  • Alexander von Humboldt-Stiftung
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 › Spectroscopy and Quantum Chemical Studies
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
Keywords
conical intersections, stimulated Raman scattering, X-ray pulses, attosecond pulses, femtosecond pulses, coherent Raman spectroscopy, photochemical dynamics, molecular photophysics
MeSH terms
Computer Simulation, Models, Theoretical, Photochemistry, Spectrum Analysis, Raman, Photochemical Processes

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