Volume 67, Number 2, July 2004
|Page(s)||301 - 306|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 July 2004|
Heating of conduction band electrons by intense femtosecond laser pulses
Centre des Lasers Intenses et Applications, UMR5107 CNRS-Université de Bordeaux I-CEA, Université de Bordeaux I - 33405 Talence Cedex, France
2 Physics Faculty, Moscow State University - Moscow 119992, Russia
3 Laboratoire des Solides Irradiés, UMR7642, CEA/DSM/DRECAM-CNRS Ecole Polytechnique - 91128 Palaiseau Cedex, France
Corresponding author: email@example.com
Accepted: 10 May 2004
We present photoelectron spectra for excited by intense femtosecond -Sapphire laser pulses. A high-energy plateau is detected in the spectra, at excitation intensities above 0.5. This plateau extends up to 24 at 3 and 90% of the emitted electrons have energy higher than twice the laser photon energy. Such intensive electron heating in solids cannot be explained in terms of phonon-assisted transitions. A model of direct interbranch transitions in the conduction band is used for the simulation of the heating process.
PACS: 79.20.Ds – Laser-beam impact phenomena
© EDP Sciences, 2004
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