首页 | 本学科首页   官方微博 | 高级检索  
     检索      

中红外组合激光场产生低于50阿秒的单个脉冲
引用本文:白婷婷,张刚台,张美光.中红外组合激光场产生低于50阿秒的单个脉冲[J].原子与分子物理学报,2013,30(6):421-426.
作者姓名:白婷婷  张刚台  张美光
作者单位:宝鸡文理学院,宝鸡文理学院,宝鸡文理学院
基金项目:ZK11135, ZK10122, ZK11061和ZK11060
摘    要:研究了氦离子在中红外组合激光场作用下的高次谐波辐射和孤立阿秒脉冲的产生. 研究结果表明,当主脉冲强度相对低时,谐波截止在657阶次处,形成一个宽度为287 eV的连续谱. 当主脉冲强度相对高时,可使谐波截止拓展到1795阶次,连续谱加宽到834 eV. 在两种情况下,我们实现了长量子路径选取,并且产生转换效率较高的连续谱. 特别是对于相对高的激光强度,叠加450—1590阶次内任意87 eV的谐波都可以直接得到50 as以内的单个脉冲.

关 键 词:高次谐波辐射,孤立阿秒脉冲,组合场
修稿时间:6/24/2012 5:46:05 PM

Isolated sub-50 as pulse generation in the combined mid-infrared laser field
Abstract:We theoretically study high-order harmonic and isolated attosecond pulse generation from a model helion ion in the combination of the mid-infrared (mid-IR) laser and an extreme ultraviolet (xuv) pulse. It is shown that, for the low laser intensity, the harmonic cutoff is at about 657th order, and the supercontinuum with a 287-eV bandwidth is formed. For the high laser intensity, the spectral cutoff is enlarged to 1795th order, and the supercontinuum is broadened to 834 eV. In these two cases, both the long quantum path selection and the enhancement of the supercontinuum are achieved. Especially for the relatively high laser intensity, pure isolated sub-50 as pulses can be directly obtained by superposing an arbitrary 87-eV harmonics in the supercontinuum from 450th to 1590th order.
Keywords:high-order harmonic generation  isolated attosecond pulse  combined field
点击此处可从《原子与分子物理学报》浏览原始摘要信息
点击此处可从《原子与分子物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号