摘要
根据Lorentz方程与电子能量方程建立了单电子对撞模型,并借助MATLAB软件模拟了与不同束腰半径的激光脉冲对撞的电子的三维运动轨迹,详细研究了圆偏振紧聚焦高斯激光脉冲束腰半径与对撞电子运动轨迹间的关系。研究结果表明,对撞电子运动轨迹的最大振幅随束腰半径的增大而增大。且在激光脉冲束腰半径较小时其变化对电子运动轨迹影响较大,随着激光束腰半径的增大,其变化对撞电子运动轨迹的影响逐渐减弱,在束腰半径大于4倍激光波长时即可近似认为束腰半径增大不再会对电子运动轨迹产生影响。
In this paper,a model of the motion of electron collided by circularly polarized laser pulse is established based on Lorentz equation and electron energy equation.The three-dimensional motion trajectory of electrons collided by laser pulses with different values of beam waist radius is simulated by MATLAB.The relationship between the beam waist radius of the circularly polarized Gaussian laser pulse and the trajectory of the collided electron are studied in detail according to this model.The simulation results present that the maximum amplitude of collided electron trajectory increases with the increasing of beam waist radius.When the laser pulse beam waist radius is relatively small,the variation of the laser pulse beam waist radius has a significant influence on the electron motion trajectory.As the laser beam waist radius increases,its influence on the trajectory of the collision electron trajectory gets weaker gradually.Finally,when the beam waist radius is greater than 4 times of the laser wavelength,it can be approximated that the increase of the beam waist radius no longer affects the trajectory of the electron.
作者
吴悦
刘宇航
崔艺
田友伟
WU Yue;LIU Yuhang;CUI Yi;TIAN Youwei(Bell Honors School,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;College of Science,Nanjing University of Posts and Telecommunications 210023,China)
出处
《激光杂志》
北大核心
2020年第7期44-46,共3页
Laser Journal
基金
国家基金项目(No.10947170)
南京邮电大学大学生创新项目(No.XYB2019512)。
关键词
圆偏振
电子运动
三维轨迹
束腰半径
MATLAB仿真
circular polarization
electron motion
3D trajectory
beam waist radius
MATLAB simulation
