1. Numerical studies of third-harmonic generation in laser filament in air perturbed by plasma spot
- Author
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Wei-Min Wang, Duanwei He, Liu-Bin Feng, Liming Chen, Zheng-Ming Sheng, Xin Lu, Tingting Xi, Yutong Li, Jinglong Ma, Jie Zhang, Xiao-Long Liu, and Quan-Li Dong
- Subjects
Protein filament ,Physics ,law ,Numerical analysis ,High harmonic generation ,Plasma effect ,Plasma ,Atomic physics ,Third harmonic ,Condensed Matter Physics ,Laser ,Interference (wave propagation) ,law.invention - Abstract
Third-harmonic emission from laser filament intercepted by plasma spot is studied by numerical simulations. Significant enhancement of the third-harmonic generation is obtained due to the disturbance of the additional plasma. The contribution of the pure plasma effect and the possible plasma-enhanced third-order susceptibility on the third-harmonic generation enhancement are compared. It is shown that the plasma induced cancellation of destructive interference [Y. Liu et al., Opt. Commun. 284, 4706 (2011)] of two-colored filament is the dominant mechanism of the enhancement of third-harmonic generation.
- Published
- 2012