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学科主题: 物理化学
题名: High-order harmonic generation spectra and isolated attosecond pulse generation with a two-color time delayed pulse
作者: Feng, Liqiang1;  Chu, Tianshu1, 2
通讯作者: 楚天舒
关键词: High-order harmonic generation ;  Isolated attosecond pulse ;  Delay time effect ;  Two-color held
刊名: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
发表日期: 2012-03-01
DOI: 10.1016/j.elspec.2011.11.004
卷: 185, 期:1-2, 页:39-46
收录类别: SCI
文章类型: Article
部门归属: 11
项目归属: 1101
产权排名: 1,1
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Spectroscopy
研究领域[WOS]: Spectroscopy
英文摘要: In this paper, we theoretically investigate the delay time effect on the high-order harmonic generation (HHG) when a model Ne atom is exposed to a two-color time delayed pulse, consisting of a 5fs/800 nm fundamental field and a 20fs/2000 nm controlling field. It shows that the HHG spectra are strongly sensitive to the delay time between the two laser fields, in particular, for the zero carrier-envelope phase (CEP) phi case (corresponding to the 800 nm fundamental field), the maximum cutoff energy has been achieved at zero delay time. However, with the introduction of the CEP (phi = 180), the delay effect on HHG is changed, exhibiting a 'U' structure harmonic emission from -1T to 1 T. In addition, the combinations of different controlling pulse frequencies and pulse intensities have also been considered, showing the similar results as the original controlling field case, but with some characteristics. Finally, by properly superposing the optimal harmonic spectrum, an isolated 45as pulse is generated without phase compensation. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: RARE-GASES ;  LASER ;  FIELD ;  INTENSITY ;  IONIZATION ;  DEPENDENCE ;  PHYSICS ;  REGIME ;  PHASE ;  ATOMS
语种: 英语
WOS记录号: WOS:000301684300008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118094
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Qingdao Univ, Inst Computat Sci & Engn, Lab New Fiber Mat & Modern Text, Growing Base State Key Lab, Qingdao 266071, Peoples R China

Recommended Citation:
Feng, Liqiang,Chu, Tianshu. High-order harmonic generation spectra and isolated attosecond pulse generation with a two-color time delayed pulse[J]. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA,2012,185(1-2):39-46.
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