Nonlinear polarization response of a gaseous medium in the regime of atom stabilization in a strong radiation field |
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Authors: | E A Volkova A M Popov O V Tikhonova |
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Institution: | 19908. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119234, Russia
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Abstract: | The nonlinear polarization response of a quantum system modeling a silver atom in the field of high-intensity radiation in the IR and UV spectral ranges has been studied by direct numerical integration of a nonstationary Schrödinger equation. The domains of applicability of perturbation theory and polarization expansion in powers of the field intensity are determined. The contribution of excited atoms and electrons in a continuum to the atomic polarization response at the field frequency, which arises due to the radiation-induced excitation and photoionization processes, is analyzed. Features of the nonlinear response to an external field under conditions of atom stabilization are considered. |
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