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High Harmonic Generation Via Continuum Wave-Packet Interference

MPG-Autoren

Kohler,  Markus C.
Max Planck Society;

Ott,  Christian
Max Planck Society;

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Raith,  Philipp
Thomas Pfeifer - Independent Junior Research Group, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Heck,  Robert
Thomas Pfeifer - Independent Junior Research Group, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Schlegel,  Iris
Thomas Pfeifer - Independent Junior Research Group, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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

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Pfeifer,  Thomas
Thomas Pfeifer - Independent Junior Research Group, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Kohler, M. C., Ott, C., Raith, P., Heck, R., Schlegel, I., Keitel, C. H., et al. (2010). High Harmonic Generation Via Continuum Wave-Packet Interference. Physical Review Letters, 105(20): 203902, pp. 1-4. doi:10.1103/PhysRevLett.105.203902.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-6FF9-3
Zusammenfassung
High-order harmonic generation (HHG) is investigated theoretically in the over-the-barrier ionization regime revealing the strong signature of interference between two separately ionized and separately propagating free wave packets of a single electron. The interference leads to the emission of coherent light at a photon energy corresponding to the kinetic-energy difference of the two recolliding electron quantum paths, thus complementary to the well-known classical three-step picture of HHG. As will be shown by time-frequency analysis of the emitted radiation, the process entirely dominates the coherent HHG emission after the atomic ground state has been depleted by a strong field. Moreover, it can be isolated from the continuum–bound harmonics via phase matching.