title: Verification of a scaling law in few-cycle laser pulses.
abstract: The scaling law of photoionization in few-cycle laser pulses is verified in this paper. By means of numerical solution of time-dependent Schrödinger equation, the photoionization and the asymmetry degree of photoionization of atoms with different binding potential irradiated by various laser pulses are studied. We find that the effect of increasing pulse intensity is compensated by deepening the atomic binding potential. In order to keep the asymmetric photoionization unchanged, if the central frequency of the pulse is enlarged by k times, the atomic binding potential should also be enlarged by k times, and the laser intensity should be enlarged by k(3) times.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Zhang
authors.forename: Jingtao
authors.initials: J
authors.lastname: Zhang
authors.forename: Lihua
authors.initials: L
authors.lastname: Bai
authors.forename: Qihuang
authors.initials: Q
authors.lastname: Gong
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu