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          Institute: MPI für Kernphysik     Collection: Theoretical Quantum Dynamics     Display Documents



ID: 322442.0, MPI für Kernphysik / Theoretical Quantum Dynamics
Relativistische Rekollisionen in starken Laserfeldern
Authors:Klaiber, Michael
Language:German
Date of Approval (YYYY-MM-DD):2007-11-07
Name of University:Ruprecht-Karls Universität
Place of University:Heidelberg
Physical Description
(e.g. Total Number of Pages):
137 S. : Ill., graph. Darst.
Audience:Experts Only
Abstract / Description:The relativistic ionization-recollision process is investigated theoretically. In order to treat the problem analytically a gauge-invariant version of the strong-field approximation is developed and employed to describe above-threshold ionization (ATI) as well as highharmonic generation (HHG). Relativistic calculations of the corresponding energy spectra show a strong suppression of the recollision of the ionized electron with the atomic core in conventional laser fields compared to the nonrelativistic approach. Three different proposals based on a modification of the driving laser via the use of attosecond laser pulse trains are presented that circumvent this problem and allow the recollision of the ionized electron in the relativistic regime. In this way coherent radiation with energies up to 10 MeV and zeptosecond -ray pulses via the HHG-process become feasible.
Document Type:PhD-Thesis
Communicated by:C.H. Keitel
Affiliations:MPI für Kernphysik/ Group of C.H. Keitel/Relativistic Quantum Dynamics and High-Energy Processes (K. Hatsagortsyan)
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