论文标题
使用高谐波极端紫外线辐射的多光谱时间分辨能量摩托明显微镜
Multispectral time-resolved energy-momentum microscopy using high-harmonic extreme ultraviolet radiation
论文作者
论文摘要
重复率为6 kHz的790 nm驱动的高谐波生成源与环形胶状单色器和高探测效率光电效率飞行时间显微镜相结合，以启用时间和动量分辨的光发射光谱频谱，而在光谱范围内与23.6 $ -45.5 $ -45.5 $ -45.5 $ -45.5 $ -45.5 $ vivs启用。在石墨烯覆盖的IR（111）上证明了三维（3D）费米的表面映射，分别具有$ \ lyssim $$ $ $ 100 $ MEV和$ \ sillesim $ 4.1 $ 0.1 $ $Å^{ - 1} $的能量和动量分辨率。桌面实验为测量3D电子结构的$ k_z $依赖性超快动力学设定了阶段，包括3D材料中的带结构，费米表面和载体动力学以及分子层中的3D轨道动力学。
A 790-nm-driven high-harmonic generation source with a repetition rate of 6 kHz is combined with a toroidal-grating monochromator and a high-detection-efficiency photoelectron time-of-flight momentum microscope to enable time- and momentum-resolved photoemission spectroscopy over a spectral range of $23.6$-$45.5$ eV with sub-100-fs time resolution. Three-dimensional (3D) Fermi surface mapping is demonstrated on graphene-covered Ir(111) with energy and momentum resolutions of $\lesssim$$100$ meV and $\lesssim$$0.1$ $Å^{-1}$, respectively. The table-top experiment sets the stage for measuring the $k_z$-dependent ultrafast dynamics of 3D electronic structure, including band structure, Fermi surface, and carrier dynamics in 3D materials as well as 3D orbital dynamics in molecular layers.
