Free electron laser generation of X-ray Poincaré beams

Morgan, Jenny and Hemsing, Erik and McNeil, Brian W J and Yao, Alison (2020) Free electron laser generation of X-ray Poincaré beams. New Journal of Physics, 22 (July). 072001. ISSN 1367-2630

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    Abstract

    An optics-free method is proposed to generate x-ray radiation with spatially variant states of polarization via an afterburner extension to a free electron laser. Control of the polarization in the transverse plane is obtained through the overlap of different coherent transverse light distributions radiated from a bunched electron beam in two consecutive orthogonally polarised undulators. Different transverse profiles are obtained by emitting at a higher harmonic in one or both of the undulators. This method enables the generation of beams structured in their intensity, phase, and polarization - so-called Poincaré beams - at high powers with tunable wavelengths. Simulations are used to demonstrate the generation of two different classes of light with spatially inhomogeneous polarization - cylindrical vector beams and full Poincaré beams.

    ORCID iDs

    Morgan, Jenny, Hemsing, Erik, McNeil, Brian W J ORCID logoORCID: https://orcid.org/0000-0002-7267-611X and Yao, Alison ORCID logoORCID: https://orcid.org/0000-0002-6260-5852;
    • Item type:Article
      ID code:72572
      Dates:
      Date
      Event
      21 July 2020
      Published
      1 July 2020
      Published Online
      1 June 2020
      Accepted
      Keywords:Free Electron Lasers (FEL), electron beams, Poincaré beams, tunable wavelengths, Optics. Light, Atomic and Molecular Physics, and Optics
      Subjects:Science > Physics > Optics. Light
      Department:Faculty of Science > Physics
      Depositing user: Pure Administrator
      Date deposited:04 Jun 2020 12:49
      Last modified:23 Sep 2021 07:45
      URI:https://strathprints.strath.ac.uk/id/eprint/72572
    CORE (COnnecting REpositories)