https://doi.org/10.1140/epjb/e2006-00337-0
On the role of athermal electrons in non-linear photoemission from Ag(100)
1
Dipartimento di Matematica e Fisica, Università Cattolica, 25121 Brescia, Italy and Sincrotrone Trieste, 34012 Basovizza, Trieste, Italy
2
Dipartimento di Matematica e Fisica, Università Cattolica, 25121 Brescia, Italy
3
Dipartimento di Fisica, Università degli Studi di Trieste, and Sincrotrone Trieste, 34012 Basovizza, Trieste, Italy
Corresponding author: a c.giannetti@dmf.unicatt.it
Received:
4
November
2005
Revised:
21
June
2006
Published online:
22
August
2006
The non-linear photoelectron spectra obtained by short laser pulses from a Ag(100) surface show a high-energy electron emission due to an athermal electron distribution created by the laser pulse. By comparing the photoemission at normal and non-normal emission geometry it is possible to evidence the independence of the hot electron photoemission on the parallel momentum and on different final-state configurations. A photoemission correlation measurement evidences that non-photoelectric effects, as tunneling or thermally assisted photoemission, do not contribute to the electron yield. Various theoretical models are discussed on the basis of the present data.
PACS: 79.60.-i – Photoemission and photoelectron spectra / 73.50.Gr – Charge carriers: generation, recombination, lifetime, trapping, mean free paths / 78.47.+p – Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006
