论文标题
时间和角度分辨光谱实验的飞行时间动量显微镜和半球分析仪的定量比较
A quantitative comparison of time-of-flight momentum microscopes and hemispherical analyzers for time- and angle-resolved photoemission spectroscopy experiments
论文作者
论文摘要
基于飞行时间的动量显微镜在光发作研究中具有增长，因为它可以对完整的光电子分布的平行能量和动量分辨的采集。在这里，我们报告了桌面极端紫外线（XUV）时间和角度分辨光发射光谱（Trarpes），这些光谱光谱（Trarpes）具有半球分析仪和同一设置中的动量显微镜。我们介绍了两个检测方案的系统比较，并量化了实验相关的参数，包括泵和探针诱导的空间充电效应，检测效率，光电子计数速率和重点深度。我们基于批量WSE2的示例性轨道测量值强调了两种工具的优点和局限性。我们的分析证明了两个光谱仪的互补性质，用于时间分辨ARPES实验。它们在单个实验设备中的组合使我们能够用Trarpes解决广泛的科学问题。
Time-of-flight-based momentum microscopy has a growing presence in photoemission studies, as it enables parallel energy- and momentum-resolved acquisition of the full photoelectron distribution. Here, we report table-top extreme ultraviolet (XUV) time- and angle-resolved photoemission spectroscopy (trARPES) featuring both a hemispherical analyzer and a momentum microscope within the same setup. We present a systematic comparison of the two detection schemes and quantify experimentally relevant parameters, including pump- and probe-induced space-charge effects, detection efficiency, photoelectron count rates, and depth of focus. We highlight the advantages and limitations of both instruments based on exemplary trARPES measurements of bulk WSe2. Our analysis demonstrates the complementary nature of the two spectrometers for time-resolved ARPES experiments. Their combination in a single experimental apparatus allows us to address a broad range of scientific questions with trARPES.
