Details
| Original language | English |
|---|---|
| Article number | 023410 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 73 |
| Issue number | 2 |
| Publication status | Published - 14 Feb 2006 |
| Externally published | Yes |
Abstract
The generation of high-order harmonics in diatomic molecules is investigated within the framework of the strong-field approximation. We show that the conventional saddle-point approximation is not suitable for large internuclear distances. An adapted saddle-point method that takes into account the molecular structure is presented. We analyze the predictions for the harmonic-generation spectra in both the velocity and length gauges. At large internuclear separations, we compare the resulting cutoffs with the predictions of the three-step semiclassical mechanism. Good agreement is obtained only by using the adapted saddle-point method combined with the velocity gauge.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 73, No. 2, 023410, 14.02.2006.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Strong-field approximation for harmonic generation in diatomic molecules
AU - Chirilǎ, Ciprian C.
AU - Lein, Manfred
N1 - Copyright: Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2006/2/14
Y1 - 2006/2/14
N2 - The generation of high-order harmonics in diatomic molecules is investigated within the framework of the strong-field approximation. We show that the conventional saddle-point approximation is not suitable for large internuclear distances. An adapted saddle-point method that takes into account the molecular structure is presented. We analyze the predictions for the harmonic-generation spectra in both the velocity and length gauges. At large internuclear separations, we compare the resulting cutoffs with the predictions of the three-step semiclassical mechanism. Good agreement is obtained only by using the adapted saddle-point method combined with the velocity gauge.
AB - The generation of high-order harmonics in diatomic molecules is investigated within the framework of the strong-field approximation. We show that the conventional saddle-point approximation is not suitable for large internuclear distances. An adapted saddle-point method that takes into account the molecular structure is presented. We analyze the predictions for the harmonic-generation spectra in both the velocity and length gauges. At large internuclear separations, we compare the resulting cutoffs with the predictions of the three-step semiclassical mechanism. Good agreement is obtained only by using the adapted saddle-point method combined with the velocity gauge.
UR - http://www.scopus.com/inward/record.url?scp=33144460767&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.73.023410
DO - 10.1103/PhysRevA.73.023410
M3 - Article
AN - SCOPUS:33144460767
VL - 73
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 2
M1 - 023410
ER -