Abstract Using an unperturbated scattering theory, the characteristics of H atom photoionization are studied respectively by a linearly and by a circularly polarized one-cycle laser pulse sequence. The asymmetries for photoelectrons in two directions opposite to each other are investigated. It is found that the asymmetry degree varies with the carrier-envelope (CE) phase, laser intensity, as well as the kinetic energy of photoelectrons. For the linear polarization, the maximal ionization rate varies with the CE phase, and the asymmetry degree varies with the CE phase in a sine-like pattern. For the circular polarizaion, the maximal ionization rate keeps constant for various CE phases, but the variation of asymmetry degree is still in a sine-like variation pattern.
Received: 08 September 2004
Revised: 25 January 2005
Accepted manuscript online:
PACS:
32.80.Fb
(Photoionization of atoms and ions)
Fund: Project supported by National Key Basic Research Special Foundation of China (Grant No G1999075200 ) and the National Natural Science Foundation of China (Grant No 60408008).
Cite this article:
Bai Li-Hua (白丽华), Zhang Jing-Tao (张敬涛), Xu Zhi-Zhan (徐至展) Asymmetry of the photoionization rate of H atoms by a sequence of one-cycle laser pulses 2005 Chinese Physics 14 1114
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
