一种用于时间分辨光电子能谱实验的基于镱的创新型超快深紫外光源。

An innovative Yb-based ultrafast deep ultraviolet source for time-resolved photoemission experiments.

作者信息

Boschini F, Hedayat H, Dallera C, Farinello P, Manzoni C, Magrez A, Berger H, Cerullo G, Carpene E

机构信息

Dipartimento di Fisica, Politecnico di Milano, 20133 Milan, Italy.

Dipartimento di Ingegneria Industriale e dell'Informazione, Università di Pavia, 27100 Pavia, Italy.

出版信息

Rev Sci Instrum. 2014 Dec;85(12):123903. doi: 10.1063/1.4903347.

DOI:10.1063/1.4903347

PMID:25554305

Abstract

Time- and angle-resolved photoemission spectroscopy is a powerful technique to study ultrafast electronic dynamics in solids. Here, an innovative optical setup based on a 100-kHz Yb laser source is presented. Exploiting non-collinear optical parametric amplification and sum-frequency generation, ultrashort pump (hν = 1.82 eV) and ultraviolet probe (hν = 6.05 eV) pulses are generated. Overall temporal and instrumental energy resolutions of, respectively, 85 fs and 50 meV are obtained. Time- and angle-resolved measurements on BiTeI semiconductor are presented to show the capabilities of the setup.

摘要

时间分辨和角分辨光电子能谱是研究固体中超快电子动力学的一种强大技术。在此，我们展示了一种基于100kHz Yb激光源的创新光学装置。利用非共线光学参量放大和和频产生，产生了超短泵浦（hν = 1.82 eV）和紫外探测（hν = 6.05 eV）脉冲。分别获得了85 fs和50 meV的整体时间分辨率和仪器能量分辨率。展示了对BiTeI半导体的时间分辨和角分辨测量结果，以展现该装置的性能。