Intensity dependence of the phase of harmonics in one- and two-frequency laser fields

Wei-Chih Liu, C. W. Clark

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The phase relationship between an induced atomic dipole moment and a driving laser field is an essential aspect of high harmonic generation (HHG) in a dense medium. A “phase-matching” criterion must be fulfilled to obtain coherent amplification of harmonic radiation, which is critical for practical HHG. We have performed numerical calculations on model atoms to survey the intensity dependence of the phase in the case of strong one- or two-frequency laser fields. The calculations show that multiphoton resonances significantly affect the yield of harmonic generation and that in the “plateau” regime, the phases exhibit only weak dependence upon the intensity of the driving field.

Original languageEnglish
Pages (from-to)3582-3586
Number of pages5
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume53
Issue number5
DOIs
Publication statusPublished - 1996 Jan 1

Fingerprint

harmonic generations
harmonics
lasers
harmonic radiation
phase matching
plateaus
dipole moments
atoms

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Intensity dependence of the phase of harmonics in one- and two-frequency laser fields. / Liu, Wei-Chih; Clark, C. W.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 53, No. 5, 01.01.1996, p. 3582-3586.

Research output: Contribution to journalArticle

@article{656dad38c0194048b188867c23cedb5b,
title = "Intensity dependence of the phase of harmonics in one- and two-frequency laser fields",
abstract = "The phase relationship between an induced atomic dipole moment and a driving laser field is an essential aspect of high harmonic generation (HHG) in a dense medium. A “phase-matching” criterion must be fulfilled to obtain coherent amplification of harmonic radiation, which is critical for practical HHG. We have performed numerical calculations on model atoms to survey the intensity dependence of the phase in the case of strong one- or two-frequency laser fields. The calculations show that multiphoton resonances significantly affect the yield of harmonic generation and that in the “plateau” regime, the phases exhibit only weak dependence upon the intensity of the driving field.",
author = "Wei-Chih Liu and Clark, {C. W.}",
year = "1996",
month = "1",
day = "1",
doi = "10.1103/PhysRevA.53.3582",
language = "English",
volume = "53",
pages = "3582--3586",
journal = "Physical Review A - Atomic, Molecular, and Optical Physics",
issn = "1050-2947",
publisher = "American Physical Society",
number = "5",

}

TY - JOUR

T1 - Intensity dependence of the phase of harmonics in one- and two-frequency laser fields

AU - Liu, Wei-Chih

AU - Clark, C. W.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - The phase relationship between an induced atomic dipole moment and a driving laser field is an essential aspect of high harmonic generation (HHG) in a dense medium. A “phase-matching” criterion must be fulfilled to obtain coherent amplification of harmonic radiation, which is critical for practical HHG. We have performed numerical calculations on model atoms to survey the intensity dependence of the phase in the case of strong one- or two-frequency laser fields. The calculations show that multiphoton resonances significantly affect the yield of harmonic generation and that in the “plateau” regime, the phases exhibit only weak dependence upon the intensity of the driving field.

AB - The phase relationship between an induced atomic dipole moment and a driving laser field is an essential aspect of high harmonic generation (HHG) in a dense medium. A “phase-matching” criterion must be fulfilled to obtain coherent amplification of harmonic radiation, which is critical for practical HHG. We have performed numerical calculations on model atoms to survey the intensity dependence of the phase in the case of strong one- or two-frequency laser fields. The calculations show that multiphoton resonances significantly affect the yield of harmonic generation and that in the “plateau” regime, the phases exhibit only weak dependence upon the intensity of the driving field.

UR - http://www.scopus.com/inward/record.url?scp=0009330637&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0009330637&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.53.3582

DO - 10.1103/PhysRevA.53.3582

M3 - Article

AN - SCOPUS:0009330637

VL - 53

SP - 3582

EP - 3586

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 5

ER -