Observation of high energy photoelectrons from solids at moderate laser intensity

被引：15

作者：

Belsky, AN ^{[1
]}

Bachau, H

Gaudin, J

Geoffroy, G

Guizard, S

Martin, P

Petite, G

Philippov, A

Vasil'ev, AN

Yatsenko, BN

机构：

[1] Univ Bordeaux 1, CEA, CNRS,UMR 5107, Ctr Lasers Intenses & Applicat, F-33405 Talence, France

[2] Ecole Polytech, CNRS,UMR 7642, CEA,DSM,DRECAM, Solides Irradies Lab, F-91128 Palaiseau, France

[3] Moscow MV Lomonosov State Univ, Dept Phys, Synchrotron Radiat Lab, Moscow 119992, Russia

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2004年 / 78卷 / 7-8期

关键词：

D O I：

10.1007/s00340-004-1438-1

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the photoemission for a set of wide band-gap crystals irradiated by femtosecond Ti-Sapphire laser pulses at intensities varying from 0.5 to 6 TW/cm(2) (below the optical breakdown threshold). The measured total electron yield increases linearly with the laser intensity in this intensity range. An intense and wide plateau of high energy electrons appears in the photoelectron spectra at excitation intensities larger than 1 TW/cm(2). The exponential cut-off of this plateau reaches 40 eV at maximal applied intensities. In order to explain such a behavior, we propose a mechanism where the heating is due to a sequence of direct interbranch one- and multi-photon transitions in the conduction band.

引用

页码：989 / 994

页数：6

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