Nonadiabatic tunneling ionization of atoms in few-cycle elliptically polarized laser pulses
- Resource Type
- Authors
- Yupeng Liu; Wenhai Xie; Min Li; Chuanpeng Cao; Yueming Zhou; Peixiang Lu
- Source
- Journal of Physics B: Atomic, Molecular and Optical Physics. 56:105601
- Subject
- Condensed Matter Physics
Atomic and Molecular Physics, and Optics
- Language
- ISSN
- 1361-6455
0953-4075
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.