Heating of conduction band electrons by intense femtosecond laser pulses

A. Belsky; P. Martin; H. Bachau; A. N. Vasil'ev; B. N. Yatsenko; S. Guizard; G. Geoffroy; G. Petite

doi:10.1209/epl/i2004-10058-0

All issues

Volume 67 / No 2 (July 2004)

Europhys. Lett., 67 2 (2004) 301-306

Abstract

Issue		Europhys. Lett. Volume 67, Number 2, July 2004


Page(s)		301 - 306
Section		Interdisciplinary physics and related areas of science and technology
DOI		https://doi.org/10.1209/epl/i2004-10058-0
Published online		01 July 2004

Europhys. Lett., 67 (2), pp. 301-306 (2004)

Heating of conduction band electrons by intense femtosecond laser pulses

A. Belsky¹^,2, P. Martin¹, H. Bachau¹, A. N. Vasil'ev², B. N. Yatsenko¹^,2, S. Guizard³, G. Geoffroy³ and G. Petite³

¹ 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: belsky@celia.u-bordeaux1.fr

Received: 11 February 2004
Accepted: 10 May 2004

Abstract

We present photoelectron spectra for $\chem{CsI}$ excited by intense femtosecond $\chem{Ti}$ -Sapphire laser pulses. A high-energy plateau is detected in the spectra, at excitation intensities above 0.5 $\un{TW/cm^2}$ . This plateau extends up to 24 $\un{eV}$ at 3 $\un{TW/cm^2}$ 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

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