1. Nonadiabatic tunneling ionization of atoms in few-cycle elliptically polarized laser pulses.
- Author
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Liu, Yupeng, Xie, Wenhai, Li, Min, Cao, Chuanpeng, Zhou, Yueming, and Lu, Peixiang
- Subjects
LASER pulses ,MOMENTUM distributions ,TUNNEL design & construction ,HYDROGEN atom ,PULSED lasers ,ATOMS ,PHOTOELECTRONS - Abstract
We theoretically investigate nonadiabatic effects in tunneling ionization of a hydrogen atom induced by a few-cycle elliptically polarized laser pulse. We find a deflection angle between the maximum of the photoelectron momentum distribution and the direction of the negative vector potential corresponding to the electric-field peak. This deflection angle mainly originates from the fact that the instant of the maximal ionization rate does not exactly correspond to the instant of the electric-field peak in the few-cycle elliptically polarized laser pulse, revealing an ionization time shift between those two instants. The ionization time shift is a result of the nonadiabatic effect induced by the envelope of the few-cycle elliptically polarized laser pulse, which disappears in a long-pulsed laser. Our study is useful for understanding attoclock experiments using few-cycle elliptically polarized laser pulses. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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