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Limit on Excitation and Stabilization of Atoms in Intense Optical Laser Fields
H Zimmermann1, S Meise1, A Khujakulov2
1Max-Born-Institute, Max-Born-Strasse 2a, 12489 Berlin, Germany.
Abstract:
Atomic excitation in strong optical laser fields has been found to take place even at intensities exceeding saturation. The concomitant acceleration of the atom in the focused laser field has been considered a strong link to, if not proof of, the existence of the so-called Kramers-Henneberger (KH) atom, a bound atomic system in an intense laser field. Recent findings have moved the importance of the KH atom from being purely of theoretical interest toward real world applications; for instance, in the context of laser filamentation. Considering this increasing importance, we explore the limits of strong-field excitation in optical fields, which are basically imposed by ionization through the spatial field envelope and the field propagation.
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