500千赫兹重复频率下极紫外波段固体的时间分辨和角分辨光电子能谱。

Time- and angle-resolved photoemission spectroscopy of solids in the extreme ultraviolet at 500 kHz repetition rate.

作者信息

Puppin M, Deng Y, Nicholson C W, Feldl J, Schröter N B M, Vita H, Kirchmann P S, Monney C, Rettig L, Wolf M, Ernstorfer R

机构信息

Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany.

Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.

出版信息

Rev Sci Instrum. 2019 Feb;90(2):023104. doi: 10.1063/1.5081938.

DOI:10.1063/1.5081938

PMID:30831759

Abstract

Time- and angle-resolved photoemission spectroscopy (trARPES) employing a 500 kHz extreme-ultraviolet light source operating at 21.7 eV probe photon energy is reported. Based on a high-power ytterbium laser, optical parametric chirped pulse amplification, and ultraviolet-driven high-harmonic generation, the light source produces an isolated high-harmonic with 110 meV bandwidth and a flux of more than 10 photons/s on the sample. Combined with a state-of-the-art ARPES chamber, this table-top experiment allows high-repetition rate pump-probe experiments of electron dynamics in occupied and normally unoccupied (excited) states in the entire Brillouin zone and with a temporal system response function below 40 fs.

摘要

报道了采用工作在21.7 eV探测光子能量的500 kHz极紫外光源的时间和角度分辨光电子能谱（trARPES）。基于高功率镱激光器、光学参量啁啾脉冲放大和紫外驱动的高次谐波产生，该光源产生带宽为110 meV的孤立高次谐波，且在样品上的通量超过10个光子/秒。结合最先进的光电子能谱腔室，这个桌面实验允许在整个布里渊区对占据态和正常未占据（激发）态的电子动力学进行高重复率泵浦 - 探测实验，并且时间系统响应函数低于40 fs。