Isolated short attosecond pulse generated using a two-color laser and a high-order pulse
Isolated short attosecond pulse generated using a two-color laser and a high-order pulse
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DOI：
10.1103/physreva.81.063813
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发表时间：
2010-06
影响因子：
2.9
通讯作者：
H. Du;Huiqiao Wang;Bi-tao Hu
中科院分区：
文献类型：
--
作者：
H. Du;Huiqiao Wang;Bi-tao Hu
从理论上研究了一种产生隔离短阿秒脉冲的有效方法。当模型氦离子暴露在强的少周期激光脉冲和低频场的组合下时，可以产生宽带极紫外超连续谱谐波。通过适当增加27次谐波脉冲来共振激发He{sup +}离子，高次谐波产生（HHG）平台的强度提高了3-4个数量级。结果表明，可以直接从HHG截止点附近的超连续介质中获得带宽为138 eV的24-as孤立脉冲。
An efficient method to generate an isolated short attosecond pulse is investigated theoretically. A broadband extreme ultraviolet supercontinuum harmonics can be generated when a model He{sup +} ion is exposed to the combination of an intense few-cycle laser pulse and a low-frequency field. By properly adding a 27th harmonics pulse to resonantly excite the He{sup +} ion, the intensity of the high-order harmonic generation (HHG) plateau is enhanced by 3-4 orders of magnitude. As a result, an isolated 24-as pulse with a bandwidth of 138 eV can be obtained directly from the supercontinuum around the cutoff of HHG.