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)†
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
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.
Received: 04 December 2008
Revised: 18 February 2009
Accepted manuscript online:
PACS:
42.65.Re
(Ultrafast processes; optical pulse generation and pulse compression)
(Beam trapping, self-focusing and defocusing; self-phase modulation)
Fund: 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.
Cite this article:
Xi Ting-Ting(奚婷婷), Lu Xin(鲁欣), Hao Zuo-Qiang(郝作强), Ma Yuan-Yuan(马媛媛), and Zhang Jie(张杰) Interaction of light filaments in air 2009 Chin. Phys. B 18 4303
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