Kosuge A, Sekikawa T, Zhou X, Kanai T, Adachi S, Watanabe S
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8581, Japan.
Phys Rev Lett. 2006 Dec 31;97(26):263901. doi: 10.1103/PhysRevLett.97.263901. Epub 2006 Dec 27.
The pulse shape and phase of isolated attosecond extreme ultraviolet (XUV) pulses with a duration of 860 asec have been determined simultaneously by using frequency-resolved optical gating based on two-photon above-threshold ionization with 28-eV photons in He. From the detailed characterization, we succeeded in shaping isolated XUV pulses on an attosecond time scale by precise dispersion control with Ar gas density or by changing the driving pulse width. These results offer a novel way to excite and observe an electron motion in atoms and molecules.
通过在氦气中使用基于28电子伏特光子的双光子阈上电离的频率分辨光学门控技术，同时测定了持续时间为860阿秒的孤立阿秒极紫外（XUV）脉冲的脉冲形状和相位。通过详细表征，我们成功地通过精确控制氩气密度的色散或改变驱动脉冲宽度，在阿秒时间尺度上对孤立的XUV脉冲进行整形。这些结果为激发和观察原子和分子中的电子运动提供了一种新方法。
