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  • Letter

Polarization conversion in the caviton driven by linearly polarized lasers

S. T. Zhang1, T. Yang2, Y. Z. Zhou1, Y. Jiang1, R. Xie1, D. J. Liu2, X. M. Li2, B. Qiao1, Z. J. Liu1,2,* et al.

L. H. Cao1,2, C. Y. Zheng1,2, and X. T. He1,2

  • 1Center for Applied Physics and Technology, HEDPS, and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China
  • 2Institute of Applied Physics and Computational Mathematics, Beijing 100088, People's Republic of China

  • *liuzj@iapcm.ac.cn
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Phys. Rev. E 105, L023202 – Published 22 February, 2022

DOI: https://doi.org/10.1103/PhysRevE.105.L023202

Abstract

In one-dimensional particle-in-cell simulations of a plasma irradiated by linearly polarized lasers from both sides of boundaries, it is found that there is an appreciable growth of the electromagnetic field in cavitons in the transverse direction perpendicular to the direction of polarization, which indicates the polarization conversion of the electromagnetic field in cavitons. This paper demonstrates the mechanism of this phenomenon based on parametric resonance induced by ponderomotive force with twice the frequency of the electromagnetic radiation in the caviton. We develop a theoretical model and verify it with simulation results. This phenomenon contributes to the heating and acceleration of particles and traps more EM energy in cavitons.

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Phys. Rev. E 105, L023202– Published 22 February, 2022
  • Received 16 August 2021
  • Revised 8 December 2021
  • Accepted 10 February 2022
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