Nonsequential double ionization of helium in IR plus XUV two-color laser fields II: collision-excitation ionization process

doi:10.1088/1361-6455/aa9e7f

	Nonsequential double ionization of helium in IR plus XUV two-color laser fields II: collision-excitation ionization process
	Jin, Facheng 5,6; Chen, Jing 4; Yang, Yujun 3; Liu, Xiaojun 2; Yan, Zong-Chao 1; Wang, Bingbing 6
刊名	JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
	2018-02-14
卷号	51 期号:3
关键词	Nonsequential Double Ionization Ir Plus Xuv Two-color Laser Fields Helium Atom Momentum Spectrum
ISSN号	0953-4075
DOI	10.1088/1361-6455/aa9e7f
文献子类	Article
英文摘要	We recently investigated the collision-ionization mechanism of the nonsequential doubleionization (NSDI) process in IR+XUV two-color laser fields [(2016) Phys. Rev. A 93 043417]. Here, we extend this work to study the collision-excitation-ionization (CEI) mechanism of the NSDI processes in the two-color laser fields with different laser conditions. It is found that the CEI mechanism makes a dominant contribution to the NSDI as the extreme ultraviolet (XUV) photon energy is smaller than the ionization threshold of the He+ ion, and the momentum spectrum shows complex interference patterns and symmetrical structures. By channel analysis, we find that, as the energy carried by the recollision electron is not enough to excite the bound electron, the bound electron will absorb XUV photons during their collision; as a result, both forward and backward collisions make a comparable contribution to the NSDI processes. However, it is found that, as the energy carried by the recollision electron is large enough to excite the bound electron, the bound electron does not absorb any XUV photon and it is excited only by sharing the energy carried by the recollision electron, hence the forward collision plays a dominant role in the NSDI processes. Moreover, we find that the interference patterns of the NSDI spectra can be reconstructed by the spectra of two above-threshold ionization (ATI) processes, which may be used to analyze the structure of the two separate ATI spectra by NSDI processes.
WOS关键词	FREE-ELECTRON LASER ; MULTIPHOTON IONIZATION ; GENERATION ; TRANSITION ; ATOMS ; ION
WOS研究方向	Optics ; Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000419626700001
资助机构	National Natural Science Foundation of China(11474348 ; National Natural Science Foundation of China(11474348 ; National Basic Research Program of China(2013CB922201) ; National Basic Research Program of China(2013CB922201) ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; 11774411 ; 11774411 ; 11334009 ; 11334009 ; 11425414) ; 11425414) ; National Natural Science Foundation of China(11474348 ; National Natural Science Foundation of China(11474348 ; National Basic Research Program of China(2013CB922201) ; National Basic Research Program of China(2013CB922201) ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; 11774411 ; 11774411 ; 11334009 ; 11334009 ; 11425414) ; 11425414) ; National Natural Science Foundation of China(11474348 ; National Natural Science Foundation of China(11474348 ; National Basic Research Program of China(2013CB922201) ; National Basic Research Program of China(2013CB922201) ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; 11774411 ; 11774411 ; 11334009 ; 11334009 ; 11425414) ; 11425414) ; National Natural Science Foundation of China(11474348 ; National Natural Science Foundation of China(11474348 ; National Basic Research Program of China(2013CB922201) ; National Basic Research Program of China(2013CB922201) ; Natural Sciences and Engineering Research Council of Canada ; Natural Sciences and Engineering Research Council of Canada ; 11774411 ; 11774411 ; 11334009 ; 11334009 ; 11425414) ; 11425414)
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/12816]
专题	中国科学院武汉物理与数学研究所
通讯作者	Wang, Bingbing
作者单位	1.Univ New Brunswick, Dept Phys, Fredericton, NB E3B 5A3, Canada 2.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China 3.Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Jilin, Peoples R China 4.Inst Appl Phys & Computat Math, POB 8009, Beijing 100088, Peoples R China 5.Xian Aeronaut Univ, Fac Sci, Xian 710077, Shaanxi, Peoples R China 6.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Lab Opt Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Jin, Facheng,Chen, Jing,Yang, Yujun,et al. Nonsequential double ionization of helium in IR plus XUV two-color laser fields II: collision-excitation ionization process[J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,2018,51(3).
APA	Jin, Facheng,Chen, Jing,Yang, Yujun,Liu, Xiaojun,Yan, Zong-Chao,&Wang, Bingbing.(2018).Nonsequential double ionization of helium in IR plus XUV two-color laser fields II: collision-excitation ionization process.JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS,51(3).
MLA	Jin, Facheng,et al."Nonsequential double ionization of helium in IR plus XUV two-color laser fields II: collision-excitation ionization process".JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS 51.3(2018).