Fiess M, Schultze M, Goulielmakis E, Dennhardt B, Gagnon J, Hofstetter M, Kienberger R, Krausz F
Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany.
Rev Sci Instrum. 2010 Sep;81(9):093103. doi: 10.1063/1.3475689.
We present the AS-2 Attosecond Beamline at the Joint Laboratory for Attosecond Physics of the Max-Planck-Institut für Quantenoptik and Ludwig-Maximilians-Universität for time resolved pump/probe experiments with attosecond resolution. High harmonic generation and subsequent filtering of the generated extreme ultraviolet (XUV) continuum by means of metal filters and XUV multilayer mirrors serve for the generation of isolated attosecond laser pulses. After high harmonic generation, the remaining fundamental laser pulse is spatially separated from the attosecond XUV pulse, to what is to our knowledge for the first time, by means of a perforated mirror in a Mach-Zehnder interferometer. Active stabilization of this interferometer guarantees the necessary temporal resolution for tracking attosecond dynamics in real time. As a proof-of-principle, photoelectron streaking experiments are performed and experimental techniques for their realization are summarized. Finally we highlight the potential of the presented beamline system for future experiments in comparison with previously demonstrated attosecond beamlines.
我们展示了马克斯·普朗克量子光学研究所和路德维希-马克西米利安大学阿秒物理联合实验室的AS-2阿秒光束线，用于具有阿秒分辨率的时间分辨泵浦/探测实验。高次谐波产生以及随后通过金属滤光片和极紫外（XUV）多层镜对产生的极紫外连续谱进行滤波，用于产生孤立的阿秒激光脉冲。在高次谐波产生之后，剩余的基频激光脉冲通过马赫-曾德尔干涉仪中的穿孔镜与阿秒XUV脉冲在空间上分离，据我们所知这是首次。该干涉仪的主动稳定确保了实时跟踪阿秒动力学所需的时间分辨率。作为原理验证，进行了光电子条纹实验并总结了其实现的实验技术。最后，与先前展示的阿秒光束线相比，我们强调了所展示的光束线系统在未来实验中的潜力。
