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Resonance fluorescence in ultrafast and intense x-ray free-electron-laser pulses

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons37677

Cavaletto,  Stefano
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30565

Harman,  Z.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;
ExtreMe Matter Institute (EMMI), Planckstrasse 1, 64291 Darmstadt, Germany;

Keitel,  C. H.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;

Externe Ressourcen
Volltexte (frei zugänglich)

1205.4918
(Preprint), 895KB

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Zitation

Cavaletto, S., Buth, C., Harman, Z., Kanter, E. P., Southworth, S. H., Young, L., et al. (2012). Resonance fluorescence in ultrafast and intense x-ray free-electron-laser pulses. Physical Review A, 86(3): 033402, pp. 1-15. doi:10.1103/PhysRevA.86.033402.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-75ED-B
Zusammenfassung
The spectrum of resonance fluorescence is calculated for a two-level system excited by an intense, ultrashort x-ray pulse made available for instance by free-electron lasers such as the Linac Coherent Light Source. We allow for inner-shell hole decay widths and destruction of the system by further photoionization. This two-level description is employed to model neon cations strongly driven by x rays tuned to the 1s 2p-1 --> 1s-1 2p transition at 848 eV; the x rays induce Rabi oscillations which are so fast that they compete with Ne 1s-hole decay. We predict resonance fluorescence spectra for two different scenarios: first, chaotic pulses based on the self-amplified spontaneous emission principle, like those presently generated at x-ray free-electron-laser facilities and, second, Gaussian pulses which will become available in the foreseeable future with self-seeding techniques. As an example of the exciting opportunities derived from the use of seeding methods, we predict, in spite of above obstacles, the possibility to distinguish at x-ray frequencies a clear signature of Rabi flopping in the spectrum of resonance fluorescence.