Terracelike structure in the above-threshold-ionization spectrum of an atom in an IR plus XUV two-color laser field

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	Terracelike structure in the above-threshold-ionization spectrum of an atom in an IR plus XUV two-color laser field
	Zhang, K ; Chen, J ; Hao, XL ; Fu, PM ; Yan, ZC ; Wang, BB
刊名	PHYSICAL REVIEW A
	2013
卷号	88 期号:4
ISSN号	1050-2947
通讯作者	Zhang, K (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Lab Opt Phys, Beijing 100190, Peoples R China.
中文摘要	Based on the frequency-domain theory, we investigate the above-threshold ionization (ATI) process of an atom in a two-color laser field with infrared (IR) and extreme ultraviolet (XUV) frequencies, where the photon energy of the XUV laser is close to or larger than the atomic ionization threshold. By using channel analysis, we find that the two laser fields play different roles in an ionization process, where the XUV laser determines the ionization probability by the photon number that the atom absorbs from it, while the IR laser accelerates the ionized electron and hence widens the electron kinetic energy spectrum. As a result, the ATI spectrum presents a terracelike structure. By using the saddle-point approximation, we obtain a classical formula which can predict the cutoff of each plateau in the terracelike ATI spectrum. Furthermore, we find that the difference of the heights between two neighboring plateaus in the terracelike structure of the ATI spectrum increases as the frequency of the XUV laser increases.
资助信息	National Natural Science Foundation of China [11074296, 61275128, 11274050]; NSERC of Canada; Canadian computing facilities of SHARCnet; National Basic Research Program of China [2013CB922200, 2012CB921302]; ACEnet
语种	英语
公开日期	2014-01-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57560]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhang, K,Chen, J,Hao, XL,et al. Terracelike structure in the above-threshold-ionization spectrum of an atom in an IR plus XUV two-color laser field[J]. PHYSICAL REVIEW A,2013,88(4).
APA	Zhang, K,Chen, J,Hao, XL,Fu, PM,Yan, ZC,&Wang, BB.(2013).Terracelike structure in the above-threshold-ionization spectrum of an atom in an IR plus XUV two-color laser field.PHYSICAL REVIEW A,88(4).
MLA	Zhang, K,et al."Terracelike structure in the above-threshold-ionization spectrum of an atom in an IR plus XUV two-color laser field".PHYSICAL REVIEW A 88.4(2013).