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题名: Intensity distributions and isolated attosecond pulse generation from molecular high-order harmonic generation in H-2(+) driven by nonhomogeneous field
作者: Feng, Liqiang1, 2;  Chu, Tianshu2, 3
刊名: PHYSICS OF PLASMAS
发表日期: 2017-10-01
DOI: 10.1063/1.5001720
卷: 24, 期:10
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Fluids & Plasmas
研究领域[WOS]: Physics
英文摘要: Intensity distributions and isolated attosecond pulse generation from the molecular high-order harmonic generation (MHHG) in H-2(+) and T-2(+) driven by the nonhomogeneous field have been theoretically investigated. (i) Generally speaking, the intensities of the harmonics driven by the homogeneous field can be enhanced as the initial vibrational state increases and much more intense harmonics can be obtained from the light nuclei. However, with the introduction of the nonhomogeneous effect, the enhanced ratios of the harmonic yields are decreased as the initial vibrational state increases. Moreover, the intensities of the harmonics from H-2(+) and T-2(+) are very sensitive to the nonhomogeneous effect of the laser field. (ii) The contributions of the MHHG from the two-H nuclei present the periodic variation as a function of the laser phase for the case of the symmetric nonhomogeneous field. However, for the case of the positive and the negative asymmetric nonhomogeneous fields, the left-H and the right-H play the dominating role in the MHHG, respectively. Moreover, as the angle between the laser polarization direction and the molecular axis increases, the intensity differences of the harmonics from the two-H nuclei are increased. (iii) By properly adding a half-cycle pulse into the positive asymmetric nonhomogeneous field, a supercontinuum with the bandwidth of 279 eV and an isolated 25 as pulse can be obtained. Published by AIP Publishing.
关键词[WOS]: LASER FIELDS ;  CHIRP CONTROL ;  IONIZATION ;  ENHANCEMENT ;  EMISSION ;  UNIPOLAR
语种: 英语
WOS记录号: WOS:000414171600117
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149700
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.Liaoning Univ Technol, Coll Sci, Lab Modern Phys, Jinzhou 121001, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
3.Qingdao Univ, Growing Base State Key Lab, Lab New Fiber Mat & Modern Text, Inst Computat Sci & Engn, Qingdao 266071, Peoples R China

Recommended Citation:
Feng, Liqiang,Chu, Tianshu. Intensity distributions and isolated attosecond pulse generation from molecular high-order harmonic generation in H-2(+) driven by nonhomogeneous field[J]. PHYSICS OF PLASMAS,2017,24(10).
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