紧聚焦强激光脉冲中电子的非对称性辐射  

Asymmetric radiation of electrons in intensely compact-focused laser pulse

作　　者：吕崇玉 陈泽洋 朱文欣 田友伟[2] LÜChongyu;CHEN Zeyang;ZHU Wenxin;TIAN Youwei(Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023,China;College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023,China)

机构地区：[1]南京邮电大学贝尔英才学院,南京210023 [2]南京邮电大学理学院,南京210023

出　　处：《激光技术》2022年第3期422-426,共5页Laser Technology

基　　金：国家自然科学基金资助项目(10947170)。

摘　　要：为了获得紧聚焦脉冲激光作用下电子的辐射特性,采用非线性Thomson散射理论和线偏振紧聚焦激光脉冲与单电子的相互作用模型,利用MATLAB完成数值模拟,获得了电子的运动特性、不同观测角度下的功率与能量分布,以及最大辐射方向上的功率与能量。结果表明,与平面波激光脉冲作用下的非线性Thomson散射现象相似而又不同,在紧聚焦激光脉冲下的辐射特性中,辐射功率脉冲双峰的脉宽分别为0.008fs和0.121fs,其对称性在时间上不再成立;辐射能量在低辐射频率0~50ω_(0)内呈现出剧烈振荡的变化特点。该结果对强激光场中电子辐射特性的研究是有帮助的。In order to obtain the electronic radiation characteristics under the action of a tightly compact-focused laser,the nonlinear Thomson scattering theory and the model for the interaction of linearly polarized compact-focused laser pulse with a single electron were utilized in this study.And the numerical simulation was completed by using MATLAB.The motion characteristics of the electron,as well as the power and energy distribution at different observation angles were analyzed,especially in the direction of maximum radiation.Compared with the plane-wave laser pulse,it is found that the symmetric-bimodal radiation power pulse no longer holds in time for the pulse width was 0.008fs and 0.121fs,respectively;And the radiation energy shows the dramatic oscillation at low radiation frequency of 0~50ω.The results can provide great value for the electron emission characteristics in intense laser field.

关 键 词：激光光学 电子辐射 非对称性 线偏振 紧聚焦激光 

分 类 号：O411.3[理学—理论物理]