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Chin. Phys. B, 2018, Vol. 27(5): 054213    DOI: 10.1088/1674-1056/27/5/054213
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Probing the structure of multi-center molecules with odd-even high harmonics

Ning Su(苏宁)1, Shujuan Yu(于术娟)1,2, Weiyan Li(李卫艳)3, Shiping Yang(杨世平)2, Yanjun Chen(陈彦军)1
1 College of Physics and Information Technology, Shaan'xi Normal University, Xi'an 710119, China;
2 College of Physics and Information Engineering, Hebei Normal University, Shijiazhuang 050024, China;
3 School of Mathematics and Science, Hebei GEO University, Shijiazhuang 050031, China
Abstract  We study high-order harmonic generation (HHG) from multi-center asymmetric linear molecules numerically and analytically. Our simulations show that odd and even HHG spectra of the asymmetric multi-center system respond differently to the change of the molecular structure. Specifically, when the internuclear distances between these nuclei of the molecule have a small change, the odd spectra usually do not change basically, but the even spectra differ remarkably. Based on this phenomenon, a simple procedure is proposed to probe the positions of these nuclei with odd-even HHG. Our results shed light on attosecond probing of the structure of multi-center molecules using HHG.
Keywords:  odd-even harmonics      multi-center asymmetric molecules      molecular structure  
Received:  24 November 2017      Revised:  02 January 2018      Accepted manuscript online: 
PACS:  42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)  
  32.80.Rm (Multiphoton ionization and excitation to highly excited states)  
Fund: Project supported by the National Natural Science Foundation of China (Grants No.91750111),the Youth Foundation of Hebei Province Education Department,China (Grant No.QN2017028),the Fundamental Research Funds for Hebei GEO University,China (Grant No.BQ2017047),the Natural Science Foundation of Hebei Province,China (Grant No.A2015205161),and the Fundamental Research Funds for the Central Universities,China (Grant No.SNNU.GK201801009).
Corresponding Authors:  Shujuan Yu, Weiyan Li, Yanjun Chen     E-mail:  yushujuan1129@163.com;liweiyanhb@126.com;chenyanjun@snnu.edu.cn

Cite this article: 

Ning Su(苏宁), Shujuan Yu(于术娟), Weiyan Li(李卫艳), Shiping Yang(杨世平), Yanjun Chen(陈彦军) Probing the structure of multi-center molecules with odd-even high harmonics 2018 Chin. Phys. B 27 054213

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