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Updated: Mar 14, 2026

Photogeneration of N-Heterocyclic Carbenes: Application in Photoinduced Ring-Opening Metathesis Polymerization
Published on: November 29, 2018
Role of tunnel ionization in high harmonic generation from substituted benzenes
Dane R Austin1, Felicity McGrath1, Lukas Miseikis1
1Blackett Laboratory, Imperial College London, London, UK. d.austin@imperial.ac.uk.
Abstract:
We theoretically study high-harmonic generation in toluene, ortho-xylene and fluorobenzene driven by a 1.8 microm 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.
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