摘要
Double ionization of H2 in a co-rotating two-color circularly polarized(TCCP)laser field is theoretically investigated.By changing the ratio of electric field peak amplitudes of the TCCP laser pulses,the double ionization probability as a function of the laser intensity shows a clear knee structure,which is suppressed significantly in the case of the atom.Due to the large spatial range of the electronic initial distribution,with the analysis of classical trajectories of ionized electrons,it is found that the ionization of the electron in the farther distance increases the probability of recollision.Furthermore,the yield of nonsequential double ionization created by the recollision can be enhanced by controlling the amplitude ratio of the TCCP laser field.
基金
supported by the National Key Research and Development Program of China(Grant No.2019YFA0307700 and No.2017YFA0403300)
National Natural Science Foundation of China(NSFC)(Grants No.11627807,No.11774175,No.11534004,No.11774129 and No.11975012)
the Jilin Provincial Research Foundation for Basic Research,China(Grant No.20170101153JC)
the Science and Technology project of the Jilin Provincial Education Department(Grant No.JJKH20190183KJ)
the outstanding Youth project of Taizhou University(Grant No.2019JQ002)。
