Am. Popov et al., Applicability of the Kramers-Henneberger approximation in the theory of strong-field ionization, J PHYS B, 32(14), 1999, pp. 3331-3345
Citations number
31
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
The ionization of the one-dimensional model system with a short-range poten
tial by a linearly polarized laser field is studied by direct numerical int
egration of the non-stationary Schrodinger equation. The results are interp
reted in terms of both field-free atomic states and Kramers-Henneberger (KH
) eigenstates. The dynamics of the system is analysed to determine which po
tential (atomic or KH) is physically more appropriate to describe the ioniz
ation process. The justification of the KH approach is also examined. A new
limitation of the validity of the KH approximation is found to exist in th
e case of low laser frequencies.