Open AccessXUV‐driven plasma switch for THz: new spatio‐temporal overlap tool for XUV–THz pump–probe experiments at FELs
Author(s) -
Zapolnova E.,
Pan R.,
Golz T.,
Sindik M.,
Nikolic M.,
Temme M.,
Rabasovic M.,
Grujic D.,
Chen Z.,
Toleikis S.,
Stojanovic N.
Publication year - 2020
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577519014164
Subject(s) - extreme ultraviolet , terahertz radiation , ultrashort pulse , laser , optics , optoelectronics , physics , materials science
A simple and robust tool for spatio‐temporal overlap of THz and XUV pulses in in‐vacuum pump–probe experiments is presented. The technique exploits ultrafast changes of the optical properties in semiconductors ( i.e. silicon) driven by ultrashort XUV pulses that are probed by THz pulses. This work demonstrates that this tool can be used for a large range of XUV fluences that are significantly lower than when probing by visible and near‐infrared pulses. This tool is mainly targeted at emerging X‐ray free‐electron laser facilities, but can be utilized also at table‐top high‐harmonics sources.