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Two-Dimensional Directional Proton Emission in Dissociative Ionization of H2

Xiaochun Gong, Peilun He, Qiying Song, Qinying Ji, Haifeng Pan, Jingxin Ding, Feng He, Heping Zeng, and Jian Wu
Phys. Rev. Lett. 113, 203001 – Published 12 November 2014

Abstract

An intense phase-controlled orthogonally polarized two-color ultrashort laser pulse is used to singly ionize and dissociate H2 into a neutral hydrogen atom and a proton. Emission-direction and kinetic-energy dependent asymmetric dissociation of H2 is observed as a function of the relative phase of the orthogonally polarized two-color pulse. Significant asymmetric proton emission is measured in the direction between two polarization axes. Our numerical simulations of the time-dependent Schrödinger equation reproduce many of the observed features. The asymmetry is attributed to the coherent superposition of two-dimensional nuclear wave packets with opposite parities, which have the same energies and overlap in the same emission directions.

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  • Received 4 June 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.203001

© 2014 American Physical Society

Authors & Affiliations

Xiaochun Gong1, Peilun He2,3, Qiying Song1, Qinying Ji1, Haifeng Pan1, Jingxin Ding1, Feng He3,*, Heping Zeng1,4,†, and Jian Wu1,‡

  • 1State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • 2School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
  • 3Key Laboratory of Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 4Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China

  • *fhe@sjtu.edu.cn
  • hpzeng@phy.ecnu.edu.cn
  • jwu@phy.ecnu.edu.cn

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Issue

Vol. 113, Iss. 20 — 14 November 2014

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