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Chin. Phys. B, 2017, Vol. 26(9): 094209    DOI: 10.1088/1674-1056/26/9/094209
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Odd-even harmonic emission from asymmetric molecules: Identifying the mechanism

Jianguo Chen(陈建国), Shujuan Yu(于术娟), Yanpeng Li(李雁鹏), Shang Wang(王赏), Yanjun Chen(陈彦军)
College of Physics and Information Technology, Shaan'xi Normal University, Xi'an 710119, China
Abstract  

We study odd-even high-order harmonic generation (HHG) from oriented asymmetric molecules HeH2+ numerically and analytically. The variational method is used to improve the analytical description of the ground-state wave function for the asymmetric system, with which the ground-state-continuum-state transition dipole is evaluated. The comparison between the odd-even HHG spectra and the improved dipoles allows us to identify and clarify the complex generation mechanism of odd-even harmonics from asymmetric molecules, providing deep insights into the relation between the odd-even HHG and the asymmetric molecular orbital.

Keywords:  odd-even harmonics      asymmetric molecules      dipoles      variational method  
Received:  22 March 2017      Revised:  25 April 2017      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 (Grant No. 11274090) and the Fundamental Research Funds for the Central Universities, China (Grant No. SNNU. GK201403002).

Corresponding Authors:  Yanjun Chen     E-mail:  chenyanjun@snnu.edu.cn

Cite this article: 

Jianguo Chen(陈建国), Shujuan Yu(于术娟), Yanpeng Li(李雁鹏), Shang Wang(王赏), Yanjun Chen(陈彦军) Odd-even harmonic emission from asymmetric molecules: Identifying the mechanism 2017 Chin. Phys. B 26 094209

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