原子与分子物理学报2012，Vol.29Issue(4)：650-654,5.DOI:10.3969/j.issn.1000-0364.2012.04.016
通过双色激光场和低频电场合成获得孤立40阿秒脉冲
An isolated 40 attosecond pulse generated by using the combination of a two-color laser pulse and a low-frequency field
摘要
Abstract
In this paper, we propose a method to expand the plateau of high-order harmonic spectrum by using the combination of a two-color laser pulse and a low-frequency field, and an isolated 40as pulse is obtained finally. We numerically solve time-dependent Schrodinger equation for the one-dimensional model of helium atom in an intense laser field, analyzing the influence of low-frequency field on high-order harmonic generation (HHG) with classical returning kinetic-energy map and time-frequency distribution. Results show that not only is the plateau of harmonic spectrum extended efficiently, but also can the 40as extremely short pulse be obtained by superposing a properly selected range of the harmonic spectrum region.关键词
高次谐波谱/阿秒脉冲/低频电场/平台区域Key words
high-order harmonic spectrum, attosecond pulse, low-frequency field, plateau分类
数理科学引用本文复制引用
韩静,吉安平,苗向阳..通过双色激光场和低频电场合成获得孤立40阿秒脉冲[J].原子与分子物理学报,2012,29(4):650-654,5.基金项目
国家自然科学基金(11047191) （11047191）
教育部科技研究重点项目(211025) （211025）
教育部高等学校博士学科点专项科研基金(新教师类)(20111404120004) （新教师类）
山西省青年科技研究基金(2009021005) （2009021005）
