中国物理B ›› 2014, Vol. 23 ›› Issue (7): 74207-074207.doi: 10.1088/1674-1056/23/7/074207

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Spectral energetic properties of the X-ray-boosted photoionization by an intense few-cycle laser

葛愉成, 何海萍   

  1. School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 收稿日期:2013-10-22 修回日期:2013-12-22 出版日期:2014-07-15 发布日期:2014-07-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11175010).

Spectral energetic properties of the X-ray-boosted photoionization by an intense few-cycle laser

Ge Yu-Cheng (葛愉成), He Hai-Ping (何海萍)   

  1. School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • Received:2013-10-22 Revised:2013-12-22 Online:2014-07-15 Published:2014-07-15
  • Contact: Ge Yu-Cheng E-mail:gyc@pku.edu.cn
  • About author:42.65.Re; 42.50.Hz; 42.50.Ct; 42.60.Jf
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11175010).

摘要: We report a discovery that an intense few-cycle laser pulse passing through gas leaves a fingerprint of its field envelope on the photoelectron energy spectrum, which involves continuous X-ray radiations. The spectrum resulting from the photoionization processes includes significant quantum enhancement and interference and exhibits interesting energetic properties. The spectral cut-off energies reflect the strength, time, and interference of the laser field modulation on the photoelectron energy. These energetic properties suggest a new method for precise intense-laser-pulse measurement in situ. The method has the advantages of accuracy, simplicity, speed, and large dynamic ranges (up to many orders of intensity).

关键词: laser intensity, pulse duration, X-ray-boosted photoionization, energetic properties of photoelectron energy spectrum

Abstract: We report a discovery that an intense few-cycle laser pulse passing through gas leaves a fingerprint of its field envelope on the photoelectron energy spectrum, which involves continuous X-ray radiations. The spectrum resulting from the photoionization processes includes significant quantum enhancement and interference and exhibits interesting energetic properties. The spectral cut-off energies reflect the strength, time, and interference of the laser field modulation on the photoelectron energy. These energetic properties suggest a new method for precise intense-laser-pulse measurement in situ. The method has the advantages of accuracy, simplicity, speed, and large dynamic ranges (up to many orders of intensity).

Key words: laser intensity, pulse duration, X-ray-boosted photoionization, energetic properties of photoelectron energy spectrum

中图分类号:  (Ultrafast processes; optical pulse generation and pulse compression)

  • 42.65.Re
42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift) 42.50.Ct (Quantum description of interaction of light and matter; related experiments) 42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation)