Generalized phase-matching conditions for high harmonics : The role of field-gradient forces
Balcou, Philippe ; Sali`eres, Pascal ; L'Huillier, Anne LU
and Lewenstein, Maciej
(1997)
In Physical Review A (Atomic, Molecular and Optical Physics)
55(4).
p.3204-3210
- Abstract
We present an approach to describe the phase matching of high harmonics emitted by laser driven atoms in a nonperturbative regime, for which the atomic response displays an intrinsic intensity-dependent phase. We show that the traditional phase-matching conditions involving conservation of wave vectors should be modified by taking into account the gradient of this atomic phase. We investigate various focusing geometries and interpret the numerical results of Sali`eres et al. [Phys. Rev. Lett. 74, 3776 (1995)]. Within the framework of the two-step model, we demonstrate that the gradient of the intensity-dependent phase can be considered as the canonical momentum gained by the electron in the continuum due to acceleration by... (More)
We present an approach to describe the phase matching of high harmonics emitted by laser driven atoms in a nonperturbative regime, for which the atomic response displays an intrinsic intensity-dependent phase. We show that the traditional phase-matching conditions involving conservation of wave vectors should be modified by taking into account the gradient of this atomic phase. We investigate various focusing geometries and interpret the numerical results of Sali`eres et al. [Phys. Rev. Lett. 74, 3776 (1995)]. Within the framework of the two-step model, we demonstrate that the gradient of the intensity-dependent phase can be considered as the canonical momentum gained by the electron in the continuum due to acceleration by field-gradient forces, including in particular the ponderomotive force.
(Less)
- author
- Balcou, Philippe
; Sali`eres, Pascal
; L'Huillier, Anne
LU
and Lewenstein, Maciej
- organization
- publishing date
- 1997-04-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review A (Atomic, Molecular and Optical Physics)
- volume
- 55
- issue
- 4
- pages
- 7 pages
- publisher
- American Physical Society
- external identifiers
-
- scopus:0000747422
- ISSN
- 1050-2947
- DOI
- 10.1103/PhysRevA.55.3204
- language
- English
- LU publication?
- yes
- id
- 3c023d66-df5b-4733-b055-5549345ae313
- date added to LUP
- 2019-05-22 16:18:48
- date last changed
- 2022-03-18 00:36:24
@article{3c023d66-df5b-4733-b055-5549345ae313,
abstract = {{<p>We present an approach to describe the phase matching of high harmonics emitted by laser driven atoms in a nonperturbative regime, for which the atomic response displays an intrinsic intensity-dependent phase. We show that the traditional phase-matching conditions involving conservation of wave vectors should be modified by taking into account the gradient of this atomic phase. We investigate various focusing geometries and interpret the numerical results of Sali`eres et al. [Phys. Rev. Lett. 74, 3776 (1995)]. Within the framework of the two-step model, we demonstrate that the gradient of the intensity-dependent phase can be considered as the canonical momentum gained by the electron in the continuum due to acceleration by field-gradient forces, including in particular the ponderomotive force.</p>}},
author = {{Balcou, Philippe and Sali`eres, Pascal and L'Huillier, Anne and Lewenstein, Maciej}},
issn = {{1050-2947}},
language = {{eng}},
month = {{04}},
number = {{4}},
pages = {{3204--3210}},
publisher = {{American Physical Society}},
series = {{Physical Review A (Atomic, Molecular and Optical Physics)}},
title = {{Generalized phase-matching conditions for high harmonics : The role of field-gradient forces}},
url = {{http://dx.doi.org/10.1103/PhysRevA.55.3204}},
doi = {{10.1103/PhysRevA.55.3204}},
volume = {{55}},
year = {{1997}},
}