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Updated: Jun 14, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Quantitative Ultrafast Electron-Temperature Dynamics in Photo-Excited Au Nanoparticles
Maria Sygletou1, Stefania Benedetti2, Marzia Ferrera1
1OptMatLab, Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, I-16146, Genova, Italy.
Abstract:
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 photo emission 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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