Abstract

MILADINOVIć, T. B.; DANILOVIć, N.  and  JEREMIć, M. Z.. Non-exponential tunneling ionization probability distribution as a function of different laser beam profiles. Rev. mex. fis. [online]. 2022, vol.68, n.4, 040401.  Epub May 19, 2023. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.68.040401.

In this paper, we discussed the probability distribution of exponential and non-exponential tunneling ionization of atoms, taking into account that the tunneling is not instantaneous, but requires a very short time interval. We also investigated how different laser beam profiles affected the probability distribution. These physical situations were analyzed for the valence electron of a potassium atom exposed to a strong laser field in a wide range of intensities (1012 - 1015 W/cm2). We used the ADK theory formalism to compute probability distributions. The results demonstrate that the probability distribution in the non-exponential mode has a significantly lower value than in the exponential mode, calculated under the same conditions. We showed that various laser beam profiles on these probability distributions produce different tunneling time intervals.

Keywords : Non-exponential decay; tunneling ionization probability; tunneling time; laser beam profiles.

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