Attosecond spectral shearing interferometry.
Attosecond spectral shearing interferometry.
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DOI：
10.1103/physrevlett.90.073902
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发表时间：
2003-02
影响因子：
8.6
通讯作者：
F. Quéré;J. Itatani;G. Yudin;P. Corkum
中科院分区：
文献类型：
--
作者：
F. Quéré;J. Itatani;G. Yudin;P. Corkum
我们表明，任意短的隔离阿秒x射线脉冲的完整表征可以实现通过应用光谱剪切干涉术的光电子波包。这些波包是由X射线脉冲的两个延时复制品通过原子的光电离相干产生的，并且通过同时施加强激光场而在能量上相对于彼此移位。X射线脉冲使用为光脉冲开发的算法重建，不需要电离物理学知识。使用800纳米的剪切场，x射线脉冲短于约400 asec可以充分的特点。
We show that the complete characterization of arbitrarily short isolated attosecond x-ray pulses can be achieved by applying spectral shearing interferometry to photoelectron wave packets. These wave packets are coherently produced through the photoionization of atoms by two time-delayed replicas of the x-ray pulse, and are shifted in energy with respect to each other by simultaneously applying a strong laser field. The x-ray pulse is reconstructed with the algorithm developed for optical pulses, which requires no knowledge of ionization physics. Using a 800-nm shearing field, x-ray pulses shorter than approximately 400 asec can be fully characterized.