The femtosecond evolution of the electronic temperature of laser-excited gold nanoparticles is measured, by means of ultrafast time-resolved photoemission spectroscopy induced by extreme-ultraviolet radiation pulses. The temperature of the electron gas is deduced by recording and fitting high-resolution photoemission spectra around the Fermi edge of gold nanoparticles providing a direct, unambiguous picture of the ultrafast electron-gas dynamics. These results will be instrumental to the refinement of existing models of femtosecond processes in laterally-confined and bulk condensed-matter systems, and for understanding more deeply the role of hot electrons in technological applications.
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Titolo: | Quantitative Ultrafast Electron-Temperature Dynamics in Photo-Excited Au Nanoparticles | |
Autori: | ||
Data di pubblicazione: | 2021 | |
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Handle: | http://hdl.handle.net/11567/1065024 | |
Appare nelle tipologie: | 01.01 - Articolo su rivista |