Isolated sub-30-as pulse generation of an He+ ion by an intense few-cycle chirped laser and its high-order harmonic pulses

doi:10.1103/PhysRevA.80.053825

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	Isolated sub-30-as pulse generation of an He+ ion by an intense few-cycle chirped laser and its high-order harmonic pulses
	Li, Peng-Cheng 1; Zhou, Xiao-Xin 1,2; Wang, Guo-Li 1; Zhao, Zeng-Xiu 3
刊名	PHYSICAL REVIEW A
	2009
卷号	80 期号:5 页码:053825
关键词	Atom-photon Collisions Helium Ions High-speed Optical Techniques Optical Harmonic Generation Photoionisation Positive Ions Schrodinger Equation
ISSN号	1050-2947
DOI	10.1103/PhysRevA.80.053825
英文摘要	We present an efficient method to generate a ultrashort attosecond (as) pulse when a model He+ ion is exposed to the combination of an intense few-cycle chirped laser pulse and its 27th harmonics. By solving the time-dependent Schroumldinger equation, we found that high-order harmonic generation (HHG) from He+ ion is enhanced by seven orders of magnitude due to the presence of the harmonic pulse. After optimizing the chirp of the fundamental pulse, we show that the cut-off energy of the generated harmonics is extended effectively to I-p+25.5U(p). As a result, an isolated 26-as pulse with a bandwidth of 170.5 eV can be obtained directly from the supercontinuum around the cut-off of HHG. To better understand the physical origin of HHG enhancement and attosecond pulse emission, we perform semiclassical simulations and analyze the time-frequency characteristics of attosecond pulse.
WOS关键词	ATTOSECOND PULSES ; MULTIPHOTON IONIZATION ; FIELD ; ATOMS ; EMISSION ; PHYSICS
WOS研究方向	Optics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000272310000171
公开日期	2010-10-29
内容类型	期刊论文
源URL	[http://ir.imp.cas.cn/handle/113462/5369]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）
通讯作者	Li, Peng-Cheng
作者单位	1.NW Normal Univ, Coll Phys & Elect Engn, Lanzhou 730070, Peoples R China 2.NWNU & IMP CAS, Joint Lab Atom & Mol Phys, Lanzhou 730070, Peoples R China 3.Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China
推荐引用方式 GB/T 7714	Li, Peng-Cheng,Zhou, Xiao-Xin,Wang, Guo-Li,et al. Isolated sub-30-as pulse generation of an He+ ion by an intense few-cycle chirped laser and its high-order harmonic pulses[J]. PHYSICAL REVIEW A,2009,80(5):053825.
APA	Li, Peng-Cheng,Zhou, Xiao-Xin,Wang, Guo-Li,&Zhao, Zeng-Xiu.(2009).Isolated sub-30-as pulse generation of an He+ ion by an intense few-cycle chirped laser and its high-order harmonic pulses.PHYSICAL REVIEW A,80(5),053825.
MLA	Li, Peng-Cheng,et al."Isolated sub-30-as pulse generation of an He+ ion by an intense few-cycle chirped laser and its high-order harmonic pulses".PHYSICAL REVIEW A 80.5(2009):053825.