›› 2014, Vol. 23 ›› Issue (9): 93205-093205.doi: 10.1088/1674-1056/23/9/093205

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Isolated attosecond pulse generation from atom radiated by a three-color laser pulse

秦岳飞a, 郭福明b, 李苏宇b, 杨玉军b, 陈高a   

  1. a School of Science, Changchun University of Science and Technology, Changchun 130022, China;
    b Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • 收稿日期:2014-05-06 修回日期:2014-07-02 出版日期:2014-09-15 发布日期:2014-09-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB922200), the National Natural Science Foundation of China (Grant Nos. 11274141, 11034003, and 11204020), the Research Foundation for Basic Research of Jilin Province, China (Grant Nos. 20130101012JC and 20140101168JC), and the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20130061110021).

Isolated attosecond pulse generation from atom radiated by a three-color laser pulse

Qin Yue-Fei (秦岳飞)a, Guo Fu-Ming (郭福明)b, Li Su-Yu (李苏宇)b, Yang Yu-Jun (杨玉军)b, Chen Gao (陈高)a   

  1. a School of Science, Changchun University of Science and Technology, Changchun 130022, China;
    b Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
  • Received:2014-05-06 Revised:2014-07-02 Online:2014-09-15 Published:2014-09-15
  • Contact: Chen Gao E-mail:chengao@cust.edu.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB922200), the National Natural Science Foundation of China (Grant Nos. 11274141, 11034003, and 11204020), the Research Foundation for Basic Research of Jilin Province, China (Grant Nos. 20130101012JC and 20140101168JC), and the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20130061110021).

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摘要： We theoretically investigate high-order harmonic and attosecond pulse generation from helium atom in a three-color laser field, which is synthesized by 10 fs/800 nm Ti-sapphire laser and a two-color field consisting of 30 fs/532 nm and 30 fs/1330 nm pulses. Compared with harmonic spectrum generated by a monochromatic field, the harmonics generated from the synthesized three-color field show a supercontinuum spectrum with a bandwidth of 235 eV, ranging from the 154th to the 306th order harmonic. This phenomenon can be attributed to the fact that the ionization of atoms as well as motion of ionized electron can be effectively controlled in the three-color field. Therefore, an isolated 46-as pulse can be generated by superposing supercontinuum from the 160th to the 210th order harmonics.

关键词: three-color laser field, high-order harmonic, isolated attosecond pulse

Abstract: We theoretically investigate high-order harmonic and attosecond pulse generation from helium atom in a three-color laser field, which is synthesized by 10 fs/800 nm Ti-sapphire laser and a two-color field consisting of 30 fs/532 nm and 30 fs/1330 nm pulses. Compared with harmonic spectrum generated by a monochromatic field, the harmonics generated from the synthesized three-color field show a supercontinuum spectrum with a bandwidth of 235 eV, ranging from the 154th to the 306th order harmonic. This phenomenon can be attributed to the fact that the ionization of atoms as well as motion of ionized electron can be effectively controlled in the three-color field. Therefore, an isolated 46-as pulse can be generated by superposing supercontinuum from the 160th to the 210th order harmonics.

Key words: three-color laser field, high-order harmonic, isolated attosecond pulse

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

  • 32.80.Rm
42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)