Coulomb exploded directional double ionization of N2O molecules in multicycle femtosecond laser pulses

doi:10.1088/1674-1056/ab38aa

Abstract

We experimentally investigate Coulomb exploded directional double ionization of N₂O molecules in elliptically polarized femtosecond laser pulses. The denitrogenation and deoxygenation channels are accessed via various pathways. It leads to distinct asymmetries in directional breaking of the doubly ionized N₂O molecules versus the instantaneous laser field vector, which is revealed by tracing the sum-momentum spectra of the ionic fragments as a recoil of the ejected electrons. Our results demonstrate that the accessibility of the Coulomb exploded double ionization channels of N₂O molecules are ruled by the detailed potential energy curves, and the directional emission of the fragments are governed by the joint effects of the electron localization-assisted enhanced ionization of the stretched molecules and the profiles of the molecular orbitals.

Keywords: strong-field ionization directional molecular bond breaking ultrafast dynamics of molecules

Received: 27 May 2019
Revised: 24 June 2019
Accepted manuscript online:

PACS:

33.80.Rv

(Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))

Fund:

Project supported by the National Key R&D Program of China (Grant No. 2018YFA0306303), the National Natural Science Fundation of China (Grant Nos. 11425416, 11834004, and 11761141004), and the 111 Project of China (Grant No. B12024).

Corresponding Authors: Jian Wu
E-mail: jwu@phy.ecnu.edu.cn

Cite this article:

Junyang Ma(马俊杨), Kang Lin(林康), Qinying Ji(季琴颖), Wenbin Zhang(张文斌), Hanxiao Li(李韩笑), Fenghao Sun(孙烽豪), Junjie Qiang(强俊杰), Peifen Lu(陆培芬), Hui Li(李辉), Xiaochun Gong(宫晓春), Jian Wu(吴健) Coulomb exploded directional double ionization of N₂O molecules in multicycle femtosecond laser pulses 2019 Chin. Phys. B 28 093301

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Coulomb exploded directional double ionization of N2O molecules in multicycle femtosecond laser pulses

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Coulomb exploded directional double ionization of N₂O molecules in multicycle femtosecond laser pulses