Within the frame of classical electrodynamics, nonlinear Thomson scattering by a stationary electron of an elliptically polarized tightly focused laser has been investigated. The electron’s trajectory, energy gain, spatial radiation distribution and temporal characteristics are studied. Due to the properties of the elliptically polarized laser pulse, the energy curve is jagged and the trajectory of electrons is in an elliptical spiral shape. It is demonstrated that the net energy gain of the electron is nearly zero in the few-cycle domain, whereas the net energy gain increases as the laser has a larger pulse width. We describe a mechanism of electron energy gain variation during an elliptical polarized laser pulse. Furthermore, with pulse width increases, the spatial radiation distribution has more sets of local maxima and each set has four local maximums. Additionally, the results show that the electron has the potential to generate a single attosecond pulse when the laser has a few-cycle width pulse. The larger the pulse width is, the weaker the maximal radiation power will be.

在经典电动力学的框架内，已经研究了椭圆偏振紧聚焦激光器的静止电子引起的非线性汤姆森散射。研究了电子的轨迹、能量增益、空间辐射分布和时间特性。由于椭圆偏振激光脉冲的特性，能量曲线呈锯齿状，电子轨迹呈椭圆螺旋状。结果表明，在少周期域中，电子的净能量增益几乎为零，而随着激光具有更大的脉冲宽度，净能量增益会增加。我们描述了椭圆偏振激光脉冲期间电子能量增益变化的机制。此外，随着脉冲宽度的增加，空间辐射分布有更多组局部最大值，每组有四个局部最大值。此外，结果表明，当激光具有几个周期宽度的脉冲时，电子有可能产生单个阿秒脉冲。脉冲宽度越大，最大辐射功率越弱。