A high-order harmonic generation apparatus for time- and angle-resolved photoelectron spectroscopy
A high-order harmonic generation apparatus for time- and angle-resolved photoelectron spectroscopy
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DOI：
10.1063/1.4812992
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发表时间：
2013-07-01
影响因子：
1.6
通讯作者：
Weinelt, M.
中科院分区：
文献类型：
--
作者：
Frietsch, B.;Carley, R.;Weinelt, M.
我们提出了一个桌面设置的时间和角度分辨光电子能谱研究相关材料的带结构动力学驱动远离平衡的飞秒激光脉冲激发。由于电子-声子平衡时间在1-2 ps的量级，因此必须实现亚皮秒时间分辨率。很少有技术提供必要的时间和能量分辨率来映射能带结构的非平衡态。激光驱动的高次谐波产生就是这样一种技术。在我们的实验中，光栅单色器提供高达40 eV的可调谐光子能量。150 meV的光子能量带宽和100 fs FWHM的脉冲持续时间使我们能够覆盖在不同k（z）映射价带和检测外核态所需的k空间。(C)2013 AIP Publishing LLC.
We present a table top setup for time- and angle-resolved photoelectron spectroscopy to investigate band structure dynamics of correlated materials driven far from equilibrium by femtosecond laser pulse excitation. With the electron-phonon equilibration time being in the order of 1-2 ps it is necessary to achieve sub-picosecond time resolution. Few techniques provide both the necessary time and energy resolution to map non-equilibrium states of the band structure. Laser-driven high-order harmonic generation is such a technique. In our experiment, a grating monochromator delivers tunable photon energies up to 40 eV. A photon energy bandwidth of 150 meV and a pulse duration of 100 fs FWHM allow us to cover the k-space necessary to map valence bands at different k(z) and detect outer core states. (C) 2013 AIP Publishing LLC.