Physics – Atomic Physics
Scientific paper
2005-02-20
Phys. Rev. Lett. 95, 043601 (2005) .
Physics
Atomic Physics
4 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.95.043601
The exact nondipole minimal-coupling Hamiltonian for an atom interacting with an explicitly time- and space-dependent laser field is transformed into the rest frame of a classical free electron in the laser field, i.e., into the Kramers-Henneberger frame. The new form of the Hamiltonian is used to study nondipole effects in the high-intensity, high-frequency regime. Fully three dimensional nondipole {\it ab initio} wavepacket calculations show that the ionization probability may decrease for increasing field strength. We identify a unique signature for the onset of this dynamical stabilization effect in the photoelectron spectrum.
Forre M.
Hansen James P.
Madsen Lars Bojer
Selsto S.
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