Propagation effects of isolated attosecond pulse generation with a multicycle chirped and chirped-free two-color field
Propagation effects of isolated attosecond pulse generation with a multicycle chirped and chirped-free two-color field
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多周期啁啾和无啁啾双色场的隔离阿秒脉冲生成的传播效应
DOI：
10.1103/physreva.84.023817
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发表时间：
2011-08
期刊：
影响因子：
--
通讯作者：
Hongchuan Du
中科院分区：
文献类型：
--
作者：
Hongchuan Du
本文从理论上研究了利用多啁啾和无啁啾双色光场产生孤立的阿秒脉冲。我们证明了多啁啾脉冲和多无啁啾脉冲的组合可以扩展极紫外超连续谱的带宽。当考虑宏观效应时，仍然可以产生宽带超连续谱。此外，宏观效应可以改善单原子宽带超连续谱的时间特性，消除宽带超连续谱的调制。这样就可以直接获得非常光滑的宽带超连续谱和纯的孤立的102-As脉冲。此外，宽带超连续谱的结构可以在一定距离后稳定地保持相对长的距离。
We present a theoretical study of isolated attosecond pulse generation with a multicycle chirped and chirped-free two-color field. We show that the bandwidth of the extreme ultraviolet supercontinuum can be extended by combining a multicycle chirped pulse and a multicycle chirped-free pulse. Also, the broadband supercontinuum can still be generated when the macroscopic effects are included. Furthermore, the macroscopic effects can ameliorate the temporal characteristic of the broadband supercontinuum of the single atom, and eliminate the modulations of the broadband supercontinuum. Thus a very smooth broadband supercontinuum and a pure isolated 102-as pulse can be directly obtained. Moreover, the structure of the broadband supercontinuum can be steadily maintained for a relative long distance after a certain distance.