Open AccessCONTRIBUTION OF THE BOUND STATES AND CONTINUUM STATES OF AN ATOM IN INTENSE LASER FIELDS TO HIGH HARMONIC GENERATION
Author(s) -
Xiaoxin Zhou,
Baiwen Li
Publication year - 2001
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.50.1902
Subject(s) - bound state , physics , high harmonic generation , schrödinger equation , atom (system on chip) , upper and lower bounds , harmonic , atomic physics , laser , quantum mechanics , mathematical analysis , mathematics , computer science , embedded system
Solving the time-dependent Schrodinger equation for a one-dimensional atom in an intense laser field based on the basis function expansion and a linear-least-squares fitting method, we examine the influence of the bound states,-continuum states and the interference between them of the model atom on the high harmonic generation. It is found that the main contributions to the low-energy harmonic generations come from the bound-bound interaction, while the high-energy harmonic generations are from the bound-continuum interaction. Beyond the cut-off, the interference of the bound-bound and bound-continuum interactions leads to the disappearance of the harmonic generation.