IONIZATION AND DOUBLE-EXCITATION OF HELIUM BY SHORT INTENSE LASER-PULSES

Authors
SCRINZI A PIRAUX B
Citation
A. Scrinzi et B. Piraux, IONIZATION AND DOUBLE-EXCITATION OF HELIUM BY SHORT INTENSE LASER-PULSES, Physical review. A, 56(1), 1997, pp. 13-16
Citations number
11
Categorie Soggetti
Physics
Journal title
Physical review. A → ACNP
ISSN journal
10502947
Volume
56
Issue
1
Year of publication
1997
Pages
13 - 16
Database
ISI
SICI code
1050-2947(1997)56:1<13:IADOHB>2.0.ZU;2-Q
Abstract
We present an ab initio calculation of single ionization, harmonic gen eration, and double excitation of helium by short (3.8-15.2 fs) modera tely strong (peak intensity 1.49 x 10(14) W/cm(2)) laser pulses with w avelengths between 40 and 152 nm. We find excitation to be dominated b y resonances with bound and doubly excited states. The processes are n onperturbative. The finite pulse duration leads to resonance broadenin g and far-off-resonant transitions.