Quantitative theory for electron-nuclear energy sharing in molecular ionization

Hao Liang and Liang-You Peng
Phys. Rev. A 101, 053404 – Published 4 May 2020

Abstract

The dynamics of molecules in strong laser fields is much more complicated than that of atoms. For example, molecules can break up through dissociative single ionization, in which the electronic dynamics and nuclear dynamics are strongly correlated with each other. In this work we develop a quantitative theory based on the strong-field approximation to describe the dissociative single ionization of a hydrogen molecule, which allows us to schematically investigate the electron-nuclear energy sharing in the dissociative and the nondissociative single ionization of H2 induced by intense laser pulses. Under different parameters of the laser pulse, we are able to discuss various types of dynamics in the framework of energy sharing, such as bond softening, dynamical quenching, vibrational trapping, and inverse bond hardening. In particular, we find drastic differences in the electron-nuclear energy sharing for UV and IR pulses. The current theoretical framework can potentially be extended to examine other strong-field phenomena in which the dynamics of different particles are correlated.

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  • Received 20 February 2020
  • Accepted 13 March 2020

DOI:https://doi.org/10.1103/PhysRevA.101.053404

©2020 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Hao Liang1 and Liang-You Peng1,2,3,4,*

  • 1State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
  • 2Nano-optoelectronics Frontier Center of the Ministry of Education and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 3Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
  • 4Beijing Academy of Quantum Information Sciences, Beijing 100193, China

  • *liangyou.peng@pku.edu.cn

See Also

Laser-wavelength and intensity dependence of electron-nuclear energy sharing in dissociative ionization of H2

Chaoxiong He, Hao Liang, Ming-Ming Liu, Liang-You Peng, and Yunquan Liu
Phys. Rev. A 101, 053403 (2020)

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Vol. 101, Iss. 5 — May 2020

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