激光脉冲与等离子体相互作用中高次谐波的产生  

Generation of High-Order Harmonics in Laser-Plasma Interaction

作　　者：万国香[1] 马善钧[1] 

机构地区：[1]江西师范大学物理与通信电子学院,江西南昌330027

出　　处：《江西师范大学学报（自然科学版）》2004年第6期525-527,共3页Journal of Jiangxi Normal University(Natural Science Edition)

摘　　要：利用强激光照射金属材料 ,致使材料表面大量分子电离产生等离子体 .该文从电子的运动方程出发 ,求解出了电子在激光场中运动的位置函数的解析解 .发现除了包含基次及二次谐波外 ,它还包含有三次、四次等高次谐波 .这说明激光脉冲与等离子体相互作用能够产生高次谐波 .谐波次数越高 ,其系数越小 .该文比较了基次与二次谐波的系数 ,其比值p >1 。Starting from the equations describing electron moving, we obtained the analytical function of the electron moving in laser fields. Besides the first and the second harmonics, it includes the third and the fourth harmonics. It is shown that high-order harmonics can be excited in laser-plasma interactions. In general, the order of the harmonics is larger, its coefficient is smaller. In this paper, we compare the coefficient of the first and the second harmonics, its ratio is larger than 1.

关 键 词：等离子体 激光脉冲 相互作用能 激光场 二次谐波 电子 运动方程 高次谐波 强激光 解析解 

分 类 号：N4[自然科学总论] TN241[电子电信—物理电子学]