Enhanced high-order harmonic generation via controlling ionization in spatially extended systems
Enhanced high-order harmonic generation via controlling ionization in spatially extended systems
复制标题
通过控制空间扩展系统中的电离来增强高次谐波的产生
DOI：
10.1103/physreva.79.053406
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发表时间：
2009-05
影响因子：
2.9
通讯作者：
Qingbin Zhang
中科院分区：
文献类型：
--
作者：
Peixiang Lu;Qingbin Zhang
从理论上研究了双色激光场作用下空间扩展系统的高次谐波产生。通过控制电子电离，{omega}+2{omega}激发方案产生有效的谐波辐射，超过I{sub p}+3.17 U {sub p}，具有奇次谐波和偶次谐波。计算表明，I{sub p}+3.17U{sub p}以上的谐波相位锁定良好，啁啾率仅为3as/eV。采用5 fs的驱动脉冲，在谐波谱中支持孤立阿秒脉冲的带宽为125 eV，可以直接获得68 as的单脉冲。
We theoretically investigate the high-order harmonic generation when the spatially extended systems are irradiated by a two-color laser field. By controlling electron ionization, the {omega}+2{omega} excitation scheme creates efficient harmonics radiation beyond I{sub p}+3.17U{sub p} with both odd and even harmonics. Calculations show that the harmonics beyond I{sub p}+3.17U{sub p} are well phase locked, moreover, the chirp rate is only 3 as/eV. Using a 5 fs driving pulse, the bandwidth supporting isolated attosecond pulse in harmonic spectrum is 125 eV, and a 68 as single pulse can be obtained straightforwardly.