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          Institute: MPI für Kernphysik     Collection: Theoretical Quantum Dynamics     Display Documents



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ID: 284816.0, MPI für Kernphysik / Theoretical Quantum Dynamics
Probing Proton Dynamics in Molecules on an Attosecond Time Scale
Authors:Baker, S.; Robinson, J. S.; Haworth, C. A.; Teng, H.; Smith, R. A.; Chirila, Ciprian C.; Lein, Manfred; Tisch, J. W. G.; Marangos, J. P.
Language:English
Date of Publication (YYYY-MM-DD):2006-04-21
Title of Journal:Science
Volume:312
Issue / Number:5772
Start Page:424
End Page:427
Copyright:© 2006 American Association for the Advancement of Science
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We demonstrate a technique that uses high-order harmonic generation in molecules to probe nuclear dynamics and structural rearrangement on a subfemtosecond time scale. The chirped nature of the electron wavepacket produced by laser ionization in a strong field gives rise to a similar chirp in the photons emitted upon electron-ion recombination. Use of this chirp in the emitted light allows information about nuclear dynamics to be gained with 100-attosecond temporal resolution, from excitation by an 8-femtosecond pulse, in a single laser shot. Measurements on molecular hydrogen and deuterium agreed well with calculations of ultrafast nuclear dynamics in the H2+ molecule, confirming the validity of the method. We then measured harmonic spectra from CH4 and CD4 to demonstrate a few-femtosecond time scale for the onset of proton rearrangement in methane upon ionization.
External Publication Status:published
Document Type:Article
Communicated by:C.H. Keitel
Affiliations:MPI für Kernphysik/ Group C.H. Keitel/Molecular Quantum Dynamics and Attosecond Physics (M. Lein)
External Affiliations:Blackett Laboratory, Imperial College London, Prince Consort Road, South Kensington, London SW7 2BZ, UK
Identifiers:DOI:10.1126/science.1123904
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