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  • Letter

Relativistic modified Bessel-Gaussian beam generated from plasma-based beam braiding

Bifeng Lei1,2,3,*, Daniel Seipt1,2,3, Mingyuan Shi1,2,3, Bin Liu1,2,†, Jingwei Wang4, Matt Zepf1,2,3, and Sergey G. Rykovanov5,‡

  • 1Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
  • 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany
  • 3Faculty of Physics and Astronomy, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
  • 4Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800 Shanghai, China
  • 5Center for Computational and Data-Intensive Science and Engineering, Skolkovo Institute of Science and Technology, Moscow 121205, Russia

  • *b.lei@hi-jena.gsi.de
  • †bin.liu@gsi.de
  • ‡S.Rykovanov@skoltech.ru
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Phys. Rev. A 104, L021501 – Published 20 August, 2021

DOI: https://doi.org/10.1103/PhysRevA.104.L021501

Abstract

We theoretically and numerically demonstrate the generation of a relativistic modified Bessel-Gaussian beam (MBGB) via plasma-based beam braiding. It is realized by injecting several intense Gaussian pulses with well-designed offsets and angles into an underdense plasma channel which acts as a laser-pulse combiner via refractive coupling. The MBGB propagates stably in the plasma channel with a well-controlled orbital angular momentum of large value, exciting a twisted plasma wave. After leaving the plasma, it becomes unguided and survives in vacuum for at least hundreds of femtoseconds. This method is insensitive to the initial laser injection conditions and thus should be robust for experimental implementation. It provides an alternative approach in generating high-quality tunable intense optical vortex beams which are desired for various applications.

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Phys. Rev. A 104, L021501– Published 20 August, 2021
  • Received 27 January 2021
  • Revised 21 May 2021
  • Accepted 10 August 2021
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