Ultrafast extreme ultraviolet photoemission electron microscope

Wei Zheng; Pengzuo Jiang; Linfeng Zhang; Yang Wang; Quan Sun; Yunquan Liu; Qihuang Gong; Chengyin Wu

doi:10.1063/5.0047076

Ultrafast extreme ultraviolet photoemission electron microscope

Rev Sci Instrum. 2021 Apr 1;92(4):043709. doi: 10.1063/5.0047076.

Authors

Wei Zheng¹, Pengzuo Jiang¹, Linfeng Zhang¹, Yang Wang¹, Quan Sun², Yunquan Liu¹, Qihuang Gong¹, Chengyin Wu¹

Affiliations

¹ State Key Laboratory for Mesoscopic Physics and Frontiers Science, Center for Nano-Optoelectronics, School of Physics, Peking University, Beijing 100871, China.
² Yangtze Delta Institute of Optoelectronics, Peking University, Nantong, Jiangsu 226010, China.

PMID: 34243459
DOI: 10.1063/5.0047076

Abstract

Here, we report our newly built table-top ultrafast extreme ultraviolet (EUV) photoemission electron microscope. The coherent ultrafast EUV light is served by a single order harmonic, which is generated by the interaction between the intense 800-nm femtosecond laser and noble gases in the hollow core fiber. The required order of the harmonic is selected out by a single grating in the off-plane mount and focused on the sample in the ultrahigh vacuum chamber of the photoemission electron microscope. Using metal gold and copper samples, the spatial resolution is calibrated to be better than 50 nm and the energy resolution is calibrated to be better than 300 meV. This microscope provides an advanced tool for studying electron dynamics covering the full Brillouin zone of solid materials with ultrahigh time, space, and energy resolution.