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Harmonic generation from laser-driven vacuum

MPG-Autoren
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Di Piazza,  Antonino
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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

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

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Zitation

Di Piazza, A., Hatsagortsyan, K. Z., & Keitel, C. H. (2005). Harmonic generation from laser-driven vacuum. Physical Review D, 72(8): 085005, pp. 1-23.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-881C-D
Zusammenfassung
We investigate the feasibility that, in the field of a superstrong standing laser wave, high-order harmonics of the pumping laser are generated from vacuum. Analytical calculations employing adiabatic perturbation theory show that, for laser electric fields larger than Ecr=m2c3/[h-bar]e=1.3×1016 V/cm, high-order harmonics are generated. The harmonic spectrum shows a wide plateau followed by a cutoff. The cutoff starts approximately at photon energies [h-bar]omegaM~sqrt([h-bar]ecE[sub L]), with EL being the amplitude of the laser field. In the opposite limit EL<<Ecr, the emission of high harmonics is very unlikely. In this case, a feasibility analysis for the experimental observation of the photon-photon scattering process using x-ray free electron lasers shows that the requirements are much less restrictive than those required to observe electron-positron pair creation.