Influence of Coulomb potential for photoionization of H atoms in an elliptically polarized laser field: Velocity gauge versus length gauge

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 强场激光物理国家重点实验室

	Influence of Coulomb potential for photoionization of H atoms in an elliptically polarized laser field: Velocity gauge versus length gauge
	Zhang JT(张敬涛) ; Nakajima Takashi
刊名	phys. rev. a
	2008
卷号	77 期号:4 页码:43417
关键词	Hydrogen atoms Photoelectron angular distributions Photoelectron energy spectra
ISSN号	1050-2947
中文摘要	we theoretically study the influence of coulomb potential for photoionization of hydrogen atoms in an intense laser field with elliptical polarization. the total ionization rates, photoelectron energy spectra, and photoelectron angular distributions are calculated with the coulomb-volkov wave functions in the velocity gauge and compared with those calculated in the length gauge as well as those calculated with the volkov wave functions. by comparing the results obtained by the coulomb-volkov and volkov wave functions, we find that for linear polarization the influence of coulomb potential is obvious for low-energy photoelectrons, and as the photoelectron energy and/or the laser intensity increase, its influence becomes smaller. this trend, however, is not so clear for the case of elliptical polarization. we also find that the twofold symmetry in the photoelectron angular distributions for elliptical polarization is caused by the cooperation of coulomb potential and interference of multiple transition channels. about the gauge issue, we show that the difference in the photoelectron angular distributions obtained by the velocity and length gauges becomes rather obvious for elliptical polarization, while the difference is generally smaller for linear polarization.
学科主题	激光技术;激光物理与基本理论
收录类别	EI
语种	英语
WOS记录号	WOS:000255457100119
公开日期	2009-09-18
内容类型	期刊论文
源URL	[http://ir.siom.ac.cn/handle/181231/558]
专题	上海光学精密机械研究所_强场激光物理国家重点实验室
推荐引用方式 GB/T 7714	Zhang JT,Nakajima Takashi. Influence of Coulomb potential for photoionization of H atoms in an elliptically polarized laser field: Velocity gauge versus length gauge[J]. phys. rev. a,2008,77(4):43417.
APA	张敬涛,&Nakajima Takashi.(2008).Influence of Coulomb potential for photoionization of H atoms in an elliptically polarized laser field: Velocity gauge versus length gauge.phys. rev. a,77(4),43417.
MLA	张敬涛,et al."Influence of Coulomb potential for photoionization of H atoms in an elliptically polarized laser field: Velocity gauge versus length gauge".phys. rev. a 77.4(2008):43417.