NONPERTURBATIVE THEORY OF HARMONIC-GENERATION IN HELIUM UNDER A HIGH-INTENSITY LASER FIELD - THE ROLE OF INTERMEDIATE RESONANCE AND OF THE ION

被引：64

作者：

XU, H

TANG, X

LAMBROPOULOS, P

机构：

来源：

PHYSICAL REVIEW A | 1992年 / 46卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.46.R2225

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The time-dependent Schrodinger equation for the helium atom with a model potential is solved on a numerical grid. The effects of intermediate-state resonance and of the ionization of the atom upon the harmonic generation are investigated. We also evaluate the contribution of the helium ion when the laser intensity is sufficiently high for most of the atoms to be ionized during the laser pulse. We find that the harmonics with order higher than 13 are due to the ion when the photon energy is 5.0 eV, while for photon energy 2.0 eV the atom produces up to about the 49th harmonic.

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页码：R2225 / R2228

页数：4

相关论文

共 18 条

[1]

ALLENDORF SW, 1992, B AM PHYS SOC, V37, P1132

[2] SOLUTIONS TO THE TIME-DEPENDENT 3-DIMENSIONAL SCHRODINGER-EQUATION - ATOMS IN INTENSE ELECTRIC-FIELDS [J].

COLLINS, LA ;

MERTS, AL .

PHYSICAL REVIEW A, 1989, 40 (07) :4127-4130

[3] MODEL-CALCULATIONS FOR AN ATOM INTERACTING WITH AN INTENSE, TIME-DEPENDENT ELECTRIC-FIELD [J].

COLLINS, LA ;

MERTS, AL .

PHYSICAL REVIEW A, 1988, 37 (07) :2415-2431

[4] CALCULATION OF HARMONIC-GENERATION DURING THE MULTIPHOTON IONIZATION OF THE HYDROGEN-ATOM [J].

DEVRIES, PL .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1990, 7 (04) :517-520

[5] ABOVE-THRESHOLD IONIZATION WITH SUBPICOSECOND LASER-PULSES [J].

FREEMAN, RR ;

BUCKSBAUM, PH ;

MILCHBERG, H ;

DARACK, S ;

SCHUMACHER, D ;

GEUSIC, ME .

PHYSICAL REVIEW LETTERS, 1987, 59 (10) :1092-1095

[6] GENERATION OF OPTICAL HARMONICS BY INTENSE PULSES OF LASER-RADIATION .2. SINGLE-ATOM SPECTRUM FOR XENON [J].

KULANDER, KC ;

SHORE, BW .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1990, 7 (04) :502-508

[7] MULTIPHOTON IONIZATION OF HYDROGEN - A TIME-DEPENDENT THEORY [J].

KULANDER, KC .

PHYSICAL REVIEW A, 1987, 35 (01) :445-447

[8] HIGH-ORDER HARMONIC-GENERATION IN XENON AT 1064-NM - THE ROLE OF PHASE MATCHING [J].

LHUILLIER, A ;

SCHAFER, KJ ;

KULANDER, KC .

PHYSICAL REVIEW LETTERS, 1991, 66 (17) :2200-2203

[9] COHERENCE AND RESONANCE EFFECTS IN HIGH-ORDER HARMONIC-GENERATION [J].

LHUILLIER, A ;

BALCOU, P ;

LOMPRE, LA .

PHYSICAL REVIEW LETTERS, 1992, 68 (02) :166-169

[10] HIGH-ORDER HARMONIC-GENERATION IN RARE-GASES WITH INTENSE SUBPICOSECOND DYE-LASER PULSES [J].

MIYAZAKI, K ;

SAKAI, H .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1992, 25 (03) :L83-L89