DIRECT OBSERVATION OF MULTIPLE-PHOTON ABSORPTION BY FREE-ELECTRONS INA WIDE BAND-GAP INSULATOR UNDER STRONG LASER IRRADIATION

Authors
DAGUZAN P GUIZARD S KRASTEV K MARTIN P PETITE G DOSSANTOS A ANTONETTI A
Citation
P. Daguzan et al., DIRECT OBSERVATION OF MULTIPLE-PHOTON ABSORPTION BY FREE-ELECTRONS INA WIDE BAND-GAP INSULATOR UNDER STRONG LASER IRRADIATION, Physical review letters, 73(17), 1994, pp. 2352-2355
Citations number
20
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
73
Issue
17
Year of publication
1994
Pages
2352 - 2355
Database
ISI
SICI code
0031-9007(1994)73:17<2352:DOOMAB>2.0.ZU;2-H
Abstract
We measure the kinetic energy of photoelectrons emitted from an cr-qua rtz surface irradiated by short (100 fs) and intense laser pulses. In the high intensity regime (above 100 GW/cm(2)), we observe a high-ener gy tail in the photoemission spectra at 620 and 560 nm. This effect di sappears for the doubled frequencies. These observations give direct e vidence of free-electron multiple photon absorption in the conduction band, in keeping with recent Monte Carlo simulation results.