Waveform control in generations of intense water window attosecond pulses via multi-color combined field

doi:10.1142/S0217979219501303

	Waveform control in generations of intense water window attosecond pulses via multi-color combined field
	Li, Liang 3; Zheng, Mian 3; Feng, R. Liqiang 1,3; Qiao, Yan 1,2
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS B
	2019-05-20
卷号	33 期号:13 页码:23
关键词	High-order harmonic generation attosecond pulse generation spatial inhomogeneous field superposed initial state multi-color combined field
ISSN号	0217-9792
DOI	10.1142/S0217979219501303
通讯作者	Feng, R. Liqiang(lqfeng1101@gmail.com) ; Qiao, Yan(qiaoyan_07@126.com)
英文摘要	The waveform control in the improvements of high-order harmonic generation (HHG) spectra and attosecond pulse signals driven by the two-color and three-color combined fields has been theoretically investigated. (a) The results show that by properly controlling the omega-2 omega two-color laser beam (including the modulations of chirps, carrier envelope phases and delay time), either the harmonic cutoff can be extended, showing a water window spectral continuum, or the selective enhancement of the single-order and two-order harmonics can be found. Further, with the introduction of a third controlling field, the efficiency of spectral continuum can be enhanced by two orders of magnitude compared with that from the two-color field. Moreover, the enhancement of HHG is not very sensitive to the frequency of the third field (i.e., the frequency of the third field is chosen to be 3 omega, 4 omega and 6 omega). Thus, some water window attosecond pulses with the durations of 60 as can be obtained. (b) Furthermore, the harmonic cutoff can be further extended when using a half-cycle controlling pulse or introducing the inhomogeneous effect of the laser field. Moreover, the efficiency of HHG can be further improved when the initial state is prepared as the superposition state of the ground state and some excited state of He atom. Consequently, a much broader spectral continuum with an intensity enhancement of another two orders of magnitude can be found. Finally, through the Fourier transformation of some spectral continuum, the intense water window attosecond pulses with the durations of 60 as can be produced.
资助项目	National Natural Science Foundation of China[11504151]
WOS关键词	ORDER HARMONIC-GENERATION ; BROAD-BAND SUPERCONTINUUM ; FREE-ELECTRON LASER ; H-2(+) ; DRIVEN ; GAS
WOS研究方向	Physics
语种	英语
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
WOS记录号	WOS:000469831800010
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/172166]
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, R. Liqiang; Qiao, Yan
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China 2.Zhengzhou Univ, Basic Med Coll, Dept Pathophysiol, Zhengzhou 450001, Henan, Peoples R China 3.Liaoning Univ Technol, Lab Mol React Dynam, Jinzhou 121000, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Li, Liang,Zheng, Mian,Feng, R. Liqiang,et al. Waveform control in generations of intense water window attosecond pulses via multi-color combined field[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B,2019,33(13):23.
APA	Li, Liang,Zheng, Mian,Feng, R. Liqiang,&Qiao, Yan.(2019).Waveform control in generations of intense water window attosecond pulses via multi-color combined field.INTERNATIONAL JOURNAL OF MODERN PHYSICS B,33(13),23.
MLA	Li, Liang,et al."Waveform control in generations of intense water window attosecond pulses via multi-color combined field".INTERNATIONAL JOURNAL OF MODERN PHYSICS B 33.13(2019):23.