原子与分子物理学报Issue(3)：437-441,5.DOI:10.3969/j.issn.1000-0364.2015.03.015
极化门控制下中红外激光场驱动He 原子产生的单个阿秒脉冲
An isolated attosecond pulse emission of He atom driven by the midinfrared laser field with polarization gating
摘要
Abstract
We investgate the high-order harmonic generation( HHG) emission of helium atom exposed to the midinfrared fields(λ=2128nm) with polarization gating by the strong field approximation(SFA) method.It is shown that the cut-off of HHG from helium atom driven by the fields is extended, and the supercontinuum spec-tra on the platuea near the cut-off are obtained.As a result, an isolated 44.5as pulse is generated by superpo-sing the some range of the supercontinuum spectra.In order to explain the emission process of HHG, we also perform the time-frequency analysis.Our results indicate that the emission of attosecond pulses outside the ga-ting are suppressed when the polarization gating is used, thus a single isolated ultrashort pulse can be generated.关键词
极化门/高次谐波/阿秒脉冲Key words
Polarization gating/High-order harmonic generation/Attosecond pulse分类
数理科学引用本文复制引用
何文娜,王国利,周效信..极化门控制下中红外激光场驱动He 原子产生的单个阿秒脉冲[J].原子与分子物理学报,2015,(3):437-441,5.基金项目
国家自然科学基金 （）
