摘要
本文提出一个简单的理论模型，模型认为在超强、超短脉冲Ｐ极化激光与固体靶相互作用过程中高次谐波的产生是固体靶表面趋肤层中的相对论电子运动形成的横向和纵向电流发出辐射的非线性叠加的结果．在此模型基础上，得到了高次谐波的角分布，并讨论了谐波转换效率与谐波次数的关系．结果表明，有超过５０次的谐波的转换效率在１０^（－６）以上．
A simple model is presented to describe the interaction of short-pulse, ultraintense, oblique incident, p-polarized laser with solid target and attribute the generation of harmonics to the nonlinear mixing of the transverse and longitudinal electronic currents in a very thin layer under the surface of the solid target. Based on this model, the angular distribution of the high harmonics was obtained and the dependence of the conversion efficiency on harmonic number and laser strength parameter was investigated.
出处
《量子电子学报》
CAS
CSCD
北大核心
2001年第4期352-356,共5页
Chinese Journal of Quantum Electronics
基金
国家863惯性约束聚变领域资助课题
国家自然科学基金资助课题(批准号:10075043)
关键词
超短脉冲激光
固体靶
高次谐波
short-pulse, ultraintense laser
solid target
plasma
high order harmonic
