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Regular version of the site

Article

Ionization induced by strong electromagnetic field in low dimensional systems bound by short range forces

Physica B: Condensed Matter. 2013. Vol. 426. No. 1. P. 158-164.

Ionization processes for a two dimensional quantum dot subjected to combined electrostatic and alternating electric fields of the same direction are studied using quantum mechanical methods.We derive analytical equations for the ionization probability in dependence on characteristic parameters of the system for both extreme cases of a constan telectric field and of a linearly polarized electromagnetic wave.The ionization probabilities for a superposition of dc and low frequency ac electric fields of the same direction are calculated.The impulse distribution of ionization probability for a system bound by short range forces is found for a superposition of constant and alternating fields. The total probability for this process per unit of timeis derived within exponential accuracy.Forthe first time the influence of alternating electric field on electron tunneling probability induced by an electrostatic field is studied taking into account the pre-exponential term.