Clocking enhanced ionization of hydrogen molecules with rotational wave packets
Laser-induced rotational wave packets of H2 and D2 molecules were experimentally measured in real time by using two sequential 25-fs laser pulses and a reaction microscope. By measuring the time-dependent yields of the above-threshold dissociation and the enhanced ionization of the molecule, we obse...
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| Hauptverfasser: | , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
23 October 2020
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| In: |
Physical review letters
Year: 2020, Jahrgang: 125, Heft: 17 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.125.173201 |
| Online-Zugang: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.125.173201 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.125.173201 
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| Verfasserangaben: | Yonghao Mi, Peng Peng, Nicolas Camus, Xufei Sun, Patrick Fross, Denhi Martinez, Zack Dube, P. B. Corkum, D. M. Villeneuve, André Staudte, Robert Moshammer, and Thomas Pfeifer |
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| 520 | |a Laser-induced rotational wave packets of H2 and D2 molecules were experimentally measured in real time by using two sequential 25-fs laser pulses and a reaction microscope. By measuring the time-dependent yields of the above-threshold dissociation and the enhanced ionization of the molecule, we observed a few-femtosecond time delay between the two dissociation channels for both H2 and D2. The delay was interpreted and reproduced by a classical model that considers enhanced ionization and thus additional interaction within the laser pulse. We demonstrate that by accurately measuring the phase of the rotational wave packet in hydrogen molecules we can resolve dissociation dynamics which is occurring within a fraction of a molecular rotation. Such a rotational clock is a general concept applicable to sequential fragmentation processes in other molecules. | ||
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