Dynamical Stabilization of Atoms at Current Laser Performances

Huens, Etienne;Piraux, Bernard
(1993) NATO Advanced Research Workshop on SILAP (Super-Intense Laser-Atom Physics) — Location: Han-Sur-Lesse, Belgium (8.January.1993)

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Recent theories indicate that a one-electron system exposed to a very strong laser pulse may become stable against ionization. By stable, we mean that there is a regime of high field intensity in which the ionization probability decreases with increasing field intensity. One usually defines two kinds of stabilization: dynamical stabilization and adiabatic stabilization. Dynamical stabilization1 results from a coherent process: following the rapid turn-on of the laser field, the system is pumped into a coherent superposition of states which is stable against ionization. This process is therefore expected to be rather sensitive to the pulse duration and to the laser frequency. By contrast, adiabatic stabilization2 results from the adiabatic evolution of a well defined unperturbed eigenstate towards individual dressed states of the system. For photon energies higher than the unperturbed ionization potential, it turns out that the energy width of these dressed states tends to zero for very high fields, exceeding the binding field of the system.
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Huens, E., & Piraux, B. (1993). Dynamical Stabilization of Atoms at Current Laser Performances. Super-Intense Laser-Atom Physics : NATO ASI Series, p. 233-244. https://doi.org/10.1007/978-1-4615-7963-2_20