In:
Optica, Optica Publishing Group, Vol. 9, No. 9 ( 2022-09-20), p. 1003-
Abstract:
Tabletop coherent x-ray sources extending to multi-keV or higher photon energies have versatile applications, including in 4D imaging and semiconductor detectors. However, these sources can be realized only via high-order harmonic generation (HHG) with an ∼ 10 µ m laser interacting with neutral atoms. As shown in previous work by Popmintchev et al. [ Science 350 , 1225 ( 2015 ) 10.1126/science.aac9755 SCIEAS00 36-8075 ], multiply ionized plasmas can efficiently produce hundred-eV harmonics with an ultraviolet laser. Here, we experimentally investigate multi-keV x-ray sources up to ∼ 5.2 k e V , the highest photon energy generated via HHG to date, to our knowledge, using a 1.45-µm driving laser that interacts with multivalent ions. Both the angular distribution and the ellipticity dependence of the signal are strong evidence of the HHG mechanism.
Type of Medium:
Online Resource
ISSN:
2334-2536
DOI:
10.1364/OPTICA.456481
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2022
detail.hit.zdb_id:
2779175-0
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