Issue 21, 2019

Controlling intramolecular hydrogen migration by asymmetric laser fields: the water case

Abstract

Hydrogen and deuterium intramolecular migration in water's isotopomer dications has been found to depend on the wavelength of the laser used for the excitation. This is imprinted in H2+ and D2+ fragment ions’ observation in the mass spectra induced by single color fs laser irradiation with 800 nm ≤ λ ≤ 1570 nm. Based on these findings, experiments with ω/2ω asymmetric laser fields (1400/700 nm) have been performed. The dissociation channels of the dications exhibit different dependence on the phase between the ω and 2ω components of the field thus offering an ability for controlling the fragmentation. For the interpretation of these observations, a tunneling mechanism is invoked.

Graphical abstract: Controlling intramolecular hydrogen migration by asymmetric laser fields: the water case

Article information

Article type
Paper
Submitted
15 Mar 2019
Accepted
09 May 2019
First published
09 May 2019
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2019,21, 11259-11265

Controlling intramolecular hydrogen migration by asymmetric laser fields: the water case

E. Kechaoglou, S. Kaziannis and C. Kosmidis, Phys. Chem. Chem. Phys., 2019, 21, 11259 DOI: 10.1039/C9CP01470E

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