Effect of electron excitation in nonsequential double ionization by intense laser fields

doi:10.1088/1674-1056/27/7/073202

中国物理B ›› 2018, Vol. 27 ›› Issue (7): 73202-073202.doi: 10.1088/1674-1056/27/7/073202

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Effect of electron excitation in nonsequential double ionization by intense laser fields

Xiang Chen(陈翔), Qiujing Han(韩秋静), Jingtao Zhang(张敬涛)

1 Department of Physics, Shanghai Normal University, Shanghai 200234, China;
2 Qingdao Binhan University, Qingdao 266555, China

收稿日期:2018-01-29 修回日期:2018-04-08 出版日期:2018-07-05 发布日期:2018-07-05
通讯作者: Jingtao Zhang E-mail:jtzhang@shnu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61475168, 11674231, and 61575124), Natural Science Foundation of Shanghai, China (Grant No. 15ZR1430600), and Shanghai Gaofeng & Gaoyuan Project for University Academic Program Development, China.

Effect of electron excitation in nonsequential double ionization by intense laser fields

Xiang Chen(陈翔)¹, Qiujing Han(韩秋静)², Jingtao Zhang(张敬涛)¹

1 Department of Physics, Shanghai Normal University, Shanghai 200234, China;
2 Qingdao Binhan University, Qingdao 266555, China

Received:2018-01-29 Revised:2018-04-08 Online:2018-07-05 Published:2018-07-05
Contact: Jingtao Zhang E-mail:jtzhang@shnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61475168, 11674231, and 61575124), Natural Science Foundation of Shanghai, China (Grant No. 15ZR1430600), and Shanghai Gaofeng & Gaoyuan Project for University Academic Program Development, China.

摘要/Abstract

摘要： We study the double ionization process of atoms in intense laser fields. The momentum distributions of the correlated electrons are calculated. Contrary to the general expectation, we show an increasing proportion of the electrons ionized via excitation with the increasing laser intensity. These electrons generally have small energy thus they concentratedly distribute on the central region of the momentum diagram. Consequently, the central part of the momentum diagram becomes more notable in higher intensity laser fields. Further study suggests that this phenomenon is general in double ionization.

关键词: electron excitation, electron collision, double ionization

Abstract: We study the double ionization process of atoms in intense laser fields. The momentum distributions of the correlated electrons are calculated. Contrary to the general expectation, we show an increasing proportion of the electrons ionized via excitation with the increasing laser intensity. These electrons generally have small energy thus they concentratedly distribute on the central region of the momentum diagram. Consequently, the central part of the momentum diagram becomes more notable in higher intensity laser fields. Further study suggests that this phenomenon is general in double ionization.

Key words: electron excitation, electron collision, double ionization

中图分类号: (Multiphoton ionization and excitation to highly excited states)

32.80.Rm

32.80.Fb (Photoionization of atoms and ions) 34.50.Rk (Laser-modified scattering and reactions) 42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)

陈翔, 韩秋静, 张敬涛. Effect of electron excitation in nonsequential double ionization by intense laser fields[J]. 中国物理B, 2018, 27(7): 73202-073202.

Xiang Chen(陈翔), Qiujing Han(韩秋静), Jingtao Zhang(张敬涛). Effect of electron excitation in nonsequential double ionization by intense laser fields[J]. Chin. Phys. B, 2018, 27(7): 73202-073202.

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Effect of electron excitation in nonsequential double ionization by intense laser fields

Effect of electron excitation in nonsequential double ionization by intense laser fields

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