角分辨光电子能谱
分辨率(逻辑)
激光器
光子能量
光子
光谱学
光电发射光谱学
能量(信号处理)
物理
原子物理学
材料科学
光学
时间分辨率
光电子学
电子结构
X射线光电子能谱
核磁共振
凝聚态物理
量子力学
人工智能
计算机科学
作者
Mojun Pan,Junde Liu,Famin Chen,Ji Wang,Chenxia Yun,Tian Qian
摘要
We present a detailed exposition of the design for time- and angle-resolved photoemission spectroscopy using a UV probe laser source that combines the nonlinear effects of β-BaB2O4 and KBe2BO3F2 optical crystals. The photon energy of the probe laser can be switched between 6.0 and 7.2 eV, with the flexibility to operate each photon energy setting under two distinct resolution configurations. Under the fully optimized energy resolution configuration, we achieve an energy resolution of 8.5 meV at 6.0 eV and 10 meV at 7.2 eV. Alternatively, switching to the other configuration enhances the temporal resolution, yielding a temporal resolution of 72 fs for 6.0 eV and 185 fs for 7.2 eV. We validated the performance and reliability of our system by applying it to measuring two typical materials: the topological insulator MnBi2Te4 and the excitonic insulator candidate Ta2NiSe5.
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