Role of tunnel ionization in high harmonic generation from substituted benzenes.

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Title: Role of tunnel ionization in high harmonic generation from substituted benzenes.
Authors: Austin, DR
McGrath, F
Miseikis, L
Wood, D
Hawkins, P
Johnson, AS
Vacher, M
Mašín, Z
Harvey, A
Ivanov, M
Smirnova, O
Marangos, JP
Item Type: Journal Article
Abstract: We theoretically study high-harmonic generation in toluene, ortho-xylene and fluorobenzene driven by a 1.8 μm ultrashort pulse. We find that the chemical substitutions have a strong influence on the amplitude and phase of the emission from the highest occupied molecular orbital, despite having a small influence on the orbital itself. We show that this influence is due to the tunnel ionization step, which depends critically on the sign and amplitude of the asymptotic part of the wave function. We discuss how these effects would manifest in phase-sensitive high-harmonic generation spectroscopy experiments.
Issue Date: 22-Jul-2016
Date of Acceptance: 4-Jul-2016
URI: http://hdl.handle.net/10044/1/42839
DOI: https://dx.doi.org/10.1039/c6fd00116e
ISSN: 1364-5498
Publisher: Royal Society of Chemistry
Start Page: 349
End Page: 368
Journal / Book Title: Faraday Discussions
Volume: 194
Copyright Statement: © 2016 The Royal Society of Chemistry
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/I032517/1
290467
EP/N018680/1
Keywords: Science & Technology
Physical Sciences
Chemistry, Physical
Chemistry
STRONG-FIELD IONIZATION
ANGULAR-DISTRIBUTIONS
LASER FIELDS
MOLECULES
DYNAMICS
PULSES
Chemical Physics
0306 Physical Chemistry (Incl. Structural)
0904 Chemical Engineering
Publication Status: Published
Conference Place: England
Appears in Collections:Quantum Optics and Laser Science
Physics
Faculty of Natural Sciences



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