中国物理B ›› 2016, Vol. 25 ›› Issue (2): 23301-023301.doi: 10.1088/1674-1056/25/2/023301

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Frequency dependence of quantum path interference in non-collinear high-order harmonic generation

Shi-Yang Zhong(钟诗阳), Xin-Kui He(贺新奎), Hao Teng(滕浩), Peng Ye(叶蓬), Li-Feng Wang(汪礼锋), Peng He(何鹏), Zhi-Yi Wei(魏志义)   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2015-08-07 修回日期:2015-11-25 出版日期:2016-02-05 发布日期:2016-02-05
  • 通讯作者: Xin-Kui He E-mail:xinkuihe@iphy.ac.cn
  • 基金资助:

    Project supported by the National Key Basic Research Program of China (Grant Nos. 2013CB922401 and 2013CB922402), the National Key Scientific Instrument and Equipment Development Projects, China (Grant No. 2012YQ12004704), the National Natural Science Foundation of China (Grant No. 11374356), and the International Joint Research Program of National Natural Science Foundation of China (Grant No. 61210017).

Frequency dependence of quantum path interference in non-collinear high-order harmonic generation

Shi-Yang Zhong(钟诗阳), Xin-Kui He(贺新奎), Hao Teng(滕浩), Peng Ye(叶蓬), Li-Feng Wang(汪礼锋), Peng He(何鹏), Zhi-Yi Wei(魏志义)   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2015-08-07 Revised:2015-11-25 Online:2016-02-05 Published:2016-02-05
  • Contact: Xin-Kui He E-mail:xinkuihe@iphy.ac.cn
  • Supported by:

    Project supported by the National Key Basic Research Program of China (Grant Nos. 2013CB922401 and 2013CB922402), the National Key Scientific Instrument and Equipment Development Projects, China (Grant No. 2012YQ12004704), the National Natural Science Foundation of China (Grant No. 11374356), and the International Joint Research Program of National Natural Science Foundation of China (Grant No. 61210017).

摘要:

High-order harmonic generation (HHG) driven by two non-collinear beams including a fundamental and its weak second harmonic is numerically studied. The interference of harmonics from adjacent electron quantum paths is found to be dependent on the relative delay of the driving pulse, and the dependences are different for different harmonic orders. This frequency dependence of the interference is attributed to the spatial frequency chirp in the HHG beam resulting from the harmonic dipole phase, which in turn provides a potential way to gain an insight into the generation of high-order harmonics. As an example, the intensity dependent dipole phase coefficient α is retrieved from the interference fringe.

关键词: high harmonic generation, non-collinear, dipole phase, ultrafast optics

Abstract:

High-order harmonic generation (HHG) driven by two non-collinear beams including a fundamental and its weak second harmonic is numerically studied. The interference of harmonics from adjacent electron quantum paths is found to be dependent on the relative delay of the driving pulse, and the dependences are different for different harmonic orders. This frequency dependence of the interference is attributed to the spatial frequency chirp in the HHG beam resulting from the harmonic dipole phase, which in turn provides a potential way to gain an insight into the generation of high-order harmonics. As an example, the intensity dependent dipole phase coefficient α is retrieved from the interference fringe.

Key words: high harmonic generation, non-collinear, dipole phase, ultrafast optics

中图分类号:  (Spectra induced by strong-field or attosecond laser irradiation)

  • 33.20.Xx
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)