中国物理B ›› 2009, Vol. 18 ›› Issue (10): 4303-4307.doi: 10.1088/1674-1056/18/10/035

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Interaction of light filaments in air

鲁欣1, 郝作强1, 奚婷婷2, 张杰3, 马媛媛4   

  1. (1)Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (2)Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; College of Physical Sciences, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; (3)Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China; (4)Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2008-12-04 修回日期:2009-02-18 出版日期:2009-10-20 发布日期:2009-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10334110, 10634020, 60621063 and 10734130), National Basic Research Programme of China (Grant No 2007CB815101) and the National Hi-Tech ICF Programme.

Interaction of light filaments in air

Xi Ting-Ting(奚婷婷)a)b), Lu Xin(鲁欣)a), Hao Zuo-Qiang(郝作强)a), Ma Yuan-Yuan(马媛媛)a)c), and Zhang Jie(张杰)a)d)†   

  1. a Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; b College of Physical Sciences, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; c State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China; d Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2008-12-04 Revised:2009-02-18 Online:2009-10-20 Published:2009-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10334110, 10634020, 60621063 and 10734130), National Basic Research Programme of China (Grant No 2007CB815101) and the National Hi-Tech ICF Programme.

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摘要： This paper analytically investigates the interaction of light filaments generated by a femtosecond laser beam in air. It obtains the Hamiltonian of a total laser field and interaction force between two filaments with different phase shifts and crossing angles. The property of the interaction force, which leads the attraction or repulsion of filaments, is basically dependent on the phase shift between filaments. The crossing angle between two filaments can only determine the magnitude of the interaction force, but does not change the property of the force.

Abstract: This paper analytically investigates the interaction of light filaments generated by a femtosecond laser beam in air. It obtains the Hamiltonian of a total laser field and interaction force between two filaments with different phase shifts and crossing angles. The property of the interaction force, which leads the attraction or repulsion of filaments, is basically dependent on the phase shift between filaments. The crossing angle between two filaments can only determine the magnitude of the interaction force, but does not change the property of the force.

Key words: femtosecond laser beam, air, light filaments, Hamiltonian

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

  • 42.65.Re
42.60.Mi (Dynamical laser instabilities; noisy laser behavior) 42.65.Jx (Beam trapping, self-focusing and defocusing; self-phase modulation)