飞秒脉冲激光作用下电子振荡导致的辐射空间分布特性
Spatial characteristics of emission from electron oscillation driven by femtosecond laser pulses
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摘要: 采用单电子模型研究了不同偏振、不同强度飞秒脉冲激光作用下电子振荡导致的辐射的空间分布特性。研究发现:随着激光强度的增加，对圆偏振激光脉冲，电子辐射的空间分布由全空间分布变为前向双叶型结构，而对线偏振激光脉冲，电子辐射的空间分布由类似于偶极天线辐射特性的四重对称双叶结构变为双重对称三叶型结构，这可以为实验研究电子的辐射提供空间分布的相关依据。Abstract: The characteristics of spatial distribution of emission from electron oscillation are analyzed with a single electron model under femtosecond laser pulses of different intensity and polarizations. It shows that with the increase of laser intensity, for circularly polarized laser pulses, the angular distribution is tipped forward more and more and increase in magnitudes; for linearly polarized laser pulses, the radiation pattern is changed from the fourfold rotational symmetry bifoliate pattern same as that from a dipole antenna to twofold rotational symmetry trefoil pattern.
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Key words:
- spatial distribution /
- electron oscillation /
- femtosecond laser /
- single electron model
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