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Wavelength Dependence of the Suppressed Ionization of Molecules in Strong Laser Fields

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30452

Ergler,  Thorsten
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31033

Senftleben,  Arne
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30893

Pflüger,  Thomas
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31014

Schröter,  Claus Dieter
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30822

Moshammer,  Robert
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31125

Ullrich,  Joachim H.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Durá, J., Grün, A., Bates, P. K., Teichmann, S. M., Ergler, T., Senftleben, A., et al. (2011). Wavelength Dependence of the Suppressed Ionization of Molecules in Strong Laser Fields. Journal of Physical Chemistry A, 116(11), 2662-2668. doi:10.1021/jp207257j.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-A84B-B
Zusammenfassung
We study ionization of molecules by an intense laser field over a broad wavelength regime, ranging from 0.8 to 1.5 μm experimentally and from 0.6 to 10 μm theoretically. A reaction microscope is combined with an optical parametric amplifier to achieve ionization yields in the near-infrared wavelength regime. Calculations are done using the strong-field S-matrix theory and agreement is found between experiment and theory, showing that ionization of many molecules is suppressed compared to the ionization of atoms with identical ionization potentials at near-infrared wavelengths at around 0.8 μm, but not at longest wavelengths (10 μm). This is due to interference effects in the electron emission that are effective at low photoelectron energies but tend to average out at higher energies. We observe the transition between suppression and nonsuppression of molecular ionization in the near-infrared wavelength regime (1–5 μm).