Effect of Auger recombination on transient optical properties in XUV and soft X-ray irradiated silicon nitride

0545328 - FZÚ 2022 RIV DE eng J - Journal Article
Tkachenko, V. - Lipp, V. - Buescher, M. - Capotondi, F. - Hoeppner, H. - Medvedev, Nikita - Pedersoli, E. - Prandolini, M.J. - Rossi, G.M. - Tavella, F. - Toleikis, S. - Windeler, M. - Ziaja, B. - Teubner, U.
Effect of Auger recombination on transient optical properties in XUV and soft X-ray irradiated silicon nitride.
Scientific Reports. Roč. 11, č. 1 (2021), č. článku 5203. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA MŠMT LTT17015
EU Projects: European Commission(XE) 654148 - LASERLAB-EUROPE
Institutional support: RVO:68378271
Keywords : temporal diagnostics of FEL pulses * optical properties of silicon nitride irradiated by XUV and soft X-ray
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 4.997, year: 2021
Method of publishing: Open access

Spatially encoded measurements of transient optical transmissivity became a standard tool for temporal diagnostics of free-electron-laser (FEL) pulses, as well as for the arrival time measurements in X-ray pump and optical probe experiments. The modern experimental techniques can measure changes in optical coefficients with a temporal resolution better than 10 fs. Carrier transport within the material and out of its significantly decrease the number of carriers. This would strongly affect the transient optical properties, making the diagnostic measurement inaccurate. We analyze in detail the effects of those processes on the optical properties of XUV and soft X-ray irradiated Si3N4, on sub-picosecond timescales. Theoretical predictions are compared with the published results of two experiments at FERMI and LCLS facilities, and with our own recent measurement.
Permanent Link: http://hdl.handle.net/11104/0322052