Strong-field polarizability-enhanced dissociative ionization

Yue L, Wustelt P, Sayler AM, Oppermann F, Lein M, Paulus GG, Gräfe S (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Physical Review A American Physical Society

Book Volume: 98

Article Number: 043418

Journal Issue: 4

DOI: 10.1103/PhysRevA.98.043418

Abstract

We investigate dissociative single and double ionization of HeH+ induced by intense femtosecond laser pulses. By employing a semiclassical model with nuclear trajectories moving on field-dressed surfaces and ionization events treated as stochastical jumps, we identify a strong-field mechanism wherein the molecules dynamically align along the laser polarization axis and stretch towards a critical internuclear distance before dissociative ionization. As the tunnel-ionization rate is larger for larger internuclear distances and for aligned samples, ionization is enhanced. The strong dynamical rotation originates from the anisotropy of the internuclear distance-dependent polarizability tensor, which features a maximum at certain internuclear distances. Good qualitative agreement with our experimental observations is found. Finally, we investigate under which experimental conditions isotope effects of different isotopologues of HeH+ can be observed.

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Gottfried Wilhelm Leibniz Universität Hannover DE Germany (DE)

How to cite

APA:

Yue, L., Wustelt, P., Sayler, A.M., Oppermann, F., Lein, M., Paulus, G.G., & Gräfe, S. (2018). Strong-field polarizability-enhanced dissociative ionization. Physical Review A, 98(4). https://doi.org/10.1103/PhysRevA.98.043418

MLA:

Yue, Lun, et al. "Strong-field polarizability-enhanced dissociative ionization." Physical Review A 98.4 (2018).

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