High-intensity attosecond X-ray source generation by using low-intensity spatial inhomogeneous mid-infrared pulse combined with an ultraviolet pulse

doi:10.1142/S0217979216502398

	High-intensity attosecond X-ray source generation by using low-intensity spatial inhomogeneous mid-infrared pulse combined with an ultraviolet pulse
	Feng, Liqiang 1,2,3; Liu, Hang 1
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS B
	2017-01-10
卷号	31 期号:1
关键词	High-order Harmonic Generation Attosecond X-ray Source Low-intensity Spatially Inhomogeneous Mid-infrared Pulse Xuv Controlling Pulse
ISSN号	0217-9792
DOI	10.1142/S0217979216502398
文献子类	Article
英文摘要	We theoretically investigate the high-order harmonic spectra and the attosecond pulse generation from He+ ion driven by the spatial inhomogeneous combined field, consisting of a two-color low-intensity mid-infrared pulse (10(13) W/cm(2)) and an ultraviolet (UV) pulse (10(12) W/cm(2)). The numerical results show that due to the spatial inhomogeneous effect, the harmonic cutoffs are remarkably extended, and a 986 eV super continuum can be obtained. Further with the proper introduction of an UV pulse (from 60 nm to 20 nm) to the two-color field, the harmonic yields are enhanced, especially for adding the 30 nm pulse case, a 1113 eV super-continuum (corresponding to a 34.1 dB enhanced field) with less harmonic modulation and six orders of magnitude enhancement can be obtained. Similar calculations have been performed for He atom and an 896 eV super-continuum with four orders of magnitude enhancement can be produced. Time frequency harmonic distribution and time-dependent electron populations show that the single short quantum path contribution is responsible for the less harmonic modulation and the laser-induced electron excitation is responsible for the harmonic enhancement. Finally, by properly superposing the harmonics, a series of sub-50-as pulses including the whole X-ray region with 3-6 orders of magnitude enhancement can be obtained.
WOS关键词	HIGH-HARMONIC-GENERATION ; BROAD-BAND SUPERCONTINUUM ; CYCLE INFRARED PULSES ; FIELD ENHANCEMENT ; UNIPOLAR
WOS研究方向	Physics
语种	英语
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
WOS记录号	WOS:000393801400002
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169648]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Feng, Liqiang
作者单位	1.Liaoning Univ Technol, Sch Chem & Environm Engn, Jinzhou 121000, Peoples R China 2.Liaoning Univ Technol, Coll Sci, Jinzhou 121000, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Feng, Liqiang,Liu, Hang. High-intensity attosecond X-ray source generation by using low-intensity spatial inhomogeneous mid-infrared pulse combined with an ultraviolet pulse[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B,2017,31(1).
APA	Feng, Liqiang,&Liu, Hang.(2017).High-intensity attosecond X-ray source generation by using low-intensity spatial inhomogeneous mid-infrared pulse combined with an ultraviolet pulse.INTERNATIONAL JOURNAL OF MODERN PHYSICS B,31(1).
MLA	Feng, Liqiang,et al."High-intensity attosecond X-ray source generation by using low-intensity spatial inhomogeneous mid-infrared pulse combined with an ultraviolet pulse".INTERNATIONAL JOURNAL OF MODERN PHYSICS B 31.1(2017).