摘要
用数值计算方法计算了不同强激光脉冲宽度下高次谐波的产生.我们发现对于激光场强度不高,不能有效电离初态的激光场,长脉冲宽度可以更有效产生高次谐波;而对于高场强的激光场,由于它能够在几个光学周期之内把原子的初态全部电离,所以短脉冲的激光场能够更有效产生高次谐波.
We calculate the high-order harmonic generation in the different intense laser pulse duration by numerical calculations.We find that if the intensity of the laser pulse is not high enough to cause considerable ionization.The more initially state,the long pulse duration laser is more efficiency to produce high-order harmonic generation.But for the strong laser field case,the intense laser can effectively ionization the initial state of atom in the several optics cycles,the short pulses has more advantage to provide high-order harmonic generation than the long pulse.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2006年第5期963-966,共4页
Journal of Atomic and Molecular Physics
基金
国家自然科学基金(60478031)
江西省科技厅资助课题(赣科发计字[2003]218号
工业攻关计划32)
江西省教育厅科技计划项目
关键词
强激光场
高次谐波
数值计算
脉冲宽度
The intense laser field,high-order harmonic generation,numerical calculations,the pulse duration
