Details
| Original language | English |
|---|---|
| Pages (from-to) | 561-577 |
| Number of pages | 17 |
| Journal | Journal of Modern Optics |
| Volume | 50 |
| Issue number | 3-4 |
| Publication status | Published - Mar 2003 |
| Externally published | Yes |
Abstract
We review recent work examining electron dynamics and high-order harmonic generation (HHG) in molecules exposed to high intensity (1013−1015 W cm−2) ultrashort pulse laser fields. The use of adiabatic laser alignment techniques, using relatively long duration (300 ps) laser pulses of moderately high intensity (1011-1012 W cm−2) enabled us to perform the first experiments investigating the role of the angle between the laser polarization vector and the molecular axis. We have shown that alignment of a sample can enhance the harmonic yield by a small but significant factor. HHG in model H2 and H+2 molecules was treated theoretically by numerical integration of the Schrödinger equation. The unique influence of the dipole phase in molecular HHG is clearly demonstrated and is shown to offer a consistent explanation for our experimental observations. The electron wavepacket dynamics exhibit strong interference effects that result in the reduction or enhancement of harmonic yield at certain alignment angles. Experiments to further investigate these effects and to increase the modulation of the harmonics by molecular alignment are discussed.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Journal of Modern Optics, Vol. 50, No. 3-4, 03.2003, p. 561-577.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Investigations of electron wave-packet dynamics and high-order harmonic generation in laser-aligned molecules
AU - Hay, N.
AU - Lein, Manfred
AU - Velotta, R.
AU - Nalda, R. De
AU - Heesel, E.
AU - Castillejo, M.
AU - Knight, Peter L.
AU - Marangos, J. P.
N1 - Funding Information: This work was supported by the UK Engineering and Physical Sciences Research Council, the EU “COCOMO” network (EU-IHP HPRN-CT-1999-00129) and EU-IHP grant number HPMF-CT-1999-00346. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2003/3
Y1 - 2003/3
N2 - We review recent work examining electron dynamics and high-order harmonic generation (HHG) in molecules exposed to high intensity (1013−1015 W cm−2) ultrashort pulse laser fields. The use of adiabatic laser alignment techniques, using relatively long duration (300 ps) laser pulses of moderately high intensity (1011-1012 W cm−2) enabled us to perform the first experiments investigating the role of the angle between the laser polarization vector and the molecular axis. We have shown that alignment of a sample can enhance the harmonic yield by a small but significant factor. HHG in model H2 and H+2 molecules was treated theoretically by numerical integration of the Schrödinger equation. The unique influence of the dipole phase in molecular HHG is clearly demonstrated and is shown to offer a consistent explanation for our experimental observations. The electron wavepacket dynamics exhibit strong interference effects that result in the reduction or enhancement of harmonic yield at certain alignment angles. Experiments to further investigate these effects and to increase the modulation of the harmonics by molecular alignment are discussed.
AB - We review recent work examining electron dynamics and high-order harmonic generation (HHG) in molecules exposed to high intensity (1013−1015 W cm−2) ultrashort pulse laser fields. The use of adiabatic laser alignment techniques, using relatively long duration (300 ps) laser pulses of moderately high intensity (1011-1012 W cm−2) enabled us to perform the first experiments investigating the role of the angle between the laser polarization vector and the molecular axis. We have shown that alignment of a sample can enhance the harmonic yield by a small but significant factor. HHG in model H2 and H+2 molecules was treated theoretically by numerical integration of the Schrödinger equation. The unique influence of the dipole phase in molecular HHG is clearly demonstrated and is shown to offer a consistent explanation for our experimental observations. The electron wavepacket dynamics exhibit strong interference effects that result in the reduction or enhancement of harmonic yield at certain alignment angles. Experiments to further investigate these effects and to increase the modulation of the harmonics by molecular alignment are discussed.
UR - http://www.scopus.com/inward/record.url?scp=1542276587&partnerID=8YFLogxK
U2 - 10.1080/09500340308233550
DO - 10.1080/09500340308233550
M3 - Article
AN - SCOPUS:1542276587
VL - 50
SP - 561
EP - 577
JO - Journal of Modern Optics
JF - Journal of Modern Optics
SN - 0950-0340
IS - 3-4
ER -