中国物理B ›› 2015, Vol. 24 ›› Issue (9): 93302-093302.doi: 10.1088/1674-1056/24/9/093302

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Theoretical approach to the study of vibrational effects on strong field ionization of molecules with alignment-dependent tunneling ionization rates

张美霞a b c, 闫冰a b, 杨玉军a b, 罗嗣佐a b, 朱瑞晗a b d, 杨雪a b e, 丁大军a b   

  1. a Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    b Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China;
    c College of Physics, Liaoning University, Shenyang 110036, China;
    d School of Science, Changchun University of Science and Technology, Changchun 130012, China;
    e College of Science, Jilin Institute of Chemical Technology, Jilin 130012, China
  • 收稿日期:2015-02-13 修回日期:2015-04-02 出版日期:2015-09-05 发布日期:2015-09-05
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB922200) and the National Natural Science Foundation of China (Grant Nos. 11034003 and 11127403).

Theoretical approach to the study of vibrational effects on strong field ionization of molecules with alignment-dependent tunneling ionization rates

Zhang Mei-Xia (张美霞)a b c, Yan Bing (闫冰)a b, Yang Yu-Jun (杨玉军)a b, Luo Si-Zuo (罗嗣佐)a b, Zhu Rui-Han (朱瑞晗)a b d, Yang Xue (杨雪)a b e, Ding Da-Jun (丁大军)a b   

  1. a Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    b Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun 130012, China;
    c College of Physics, Liaoning University, Shenyang 110036, China;
    d School of Science, Changchun University of Science and Technology, Changchun 130012, China;
    e College of Science, Jilin Institute of Chemical Technology, Jilin 130012, China
  • Received:2015-02-13 Revised:2015-04-02 Online:2015-09-05 Published:2015-09-05
  • Contact: Ding Da-Jun E-mail:dajund@jlu.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB922200) and the National Natural Science Foundation of China (Grant Nos. 11034003 and 11127403).

摘要: The tunneling ionization rates of vibrationally excited N2 molecules at the ground electronic state are calculated using molecular orbital Ammosov-Delone-Krainov theory considering R-dependence. The results show that molecular alignment significantly affects the ionization rate, as the rate is mainly determined by the electron density distribution of the highest occupied molecular orbital. The present work indicates that the ratios of alignment-dependent rates of different vibrational levels to that of the vibrational ground level increase for the aligned N2 at the angle θ= 0°, and suggests that the alignment-dependent tunneling ionization rates can be used as a diagnostics for the influence of vibrational excitation on the strong field ionization of molecules.

关键词: vibration, alignment-dependent ionization rate, tunneling ionization theory

Abstract: The tunneling ionization rates of vibrationally excited N2 molecules at the ground electronic state are calculated using molecular orbital Ammosov-Delone-Krainov theory considering R-dependence. The results show that molecular alignment significantly affects the ionization rate, as the rate is mainly determined by the electron density distribution of the highest occupied molecular orbital. The present work indicates that the ratios of alignment-dependent rates of different vibrational levels to that of the vibrational ground level increase for the aligned N2 at the angle θ= 0°, and suggests that the alignment-dependent tunneling ionization rates can be used as a diagnostics for the influence of vibrational excitation on the strong field ionization of molecules.

Key words: vibration, alignment-dependent ionization rate, tunneling ionization theory

中图分类号:  (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))

  • 33.80.Rv
42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)