物理学报2012，Vol.61Issue(23)：187-192,6.
利用两色组合激光场驱动氦原子产生单个阿秒脉冲
Isolated attosecond pulse generated by a model helium atom exposed to the combined field
摘要
Abstract
We theoretically study the high-order harmonic generation (HHG) of a model He atom exposed to a combined field of 1600 nm and 800 nm laser pulses. The changing of rising rate and falling rate with time for the combined filed during main HHG, can present the different characteristics of high-order harmonic generation from the short electron trajectories and the long electron trajectories. By superimposing several harmonics generated from He atom driven by the combined field, we could obtain shorter attosecond pulses. Fi- nally, by adjusting the time delay between two laser pulses, we can effectively suppress the contribution of the short electron trajectories to HHG, and obtain an isolated attosecond pulse with duration 33.7 as.关键词
组合场/高次谐波/阿秒脉冲Key words
combined field/high-order harmonic generation/attosecond pulse分类
数理科学引用本文复制引用
黄峰,李鹏程,周效信..利用两色组合激光场驱动氦原子产生单个阿秒脉冲[J].物理学报,2012,61(23):187-192,6.基金项目
国家自然科学基金（批准号：11044007,11047016,11264036）、高等学校博士学科点专项科研基金（批准号：20096203110001）和西北师范大学创新基金（批准号：NWNU.KJCXGC.03-62）资助的课题. （）
