Femtosecond polarization shaping of free-electron laser pulses

Perosa, Giovanni and Watzel, Jonas and Garzella, David and Allaria, Enrico and Bonanomi, Matteo and Danailov, Miltcho Boyanov and Brynes, Alexander and Callegari, Carlo and De Ninno, Giovanni and Demidovich, Alexander and Di Fraia, Michele and Di Mitri, Simone and Giannessi, Luca and Manfredda, Michele and Novinec, Luka and Pal, Nitish and Penco, Giuseppe and Plekan, Oksana and Prince, Kevin C. and Simoncig, Alberto and Spampinati, Simone and Spezzani, Carlo and Zangrando, Marco and Berakdar, Jamal and Feifel, Raimund and Squibb, Richard J. and Coffee, Ryan and Hemsing, Erik and Roussel, Eleonore and Sansone, Giuseppe and McNeil, Brian and Ribic, Primoz Rebernik (2023) Femtosecond polarization shaping of free-electron laser pulses. Physical Review Letters, 131 (4). 045001. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.131.045001)

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Abstract

We demonstrate the generation of extreme-ultraviolet (XUV) free-electron laser (FEL) pulses with time-dependent polarization. To achieve polarization modulation on a femtosecond timescale, we combine two mutually delayed counterrotating circularly polarized subpulses from two cross-polarized undulators. The polarization profile of the pulses is probed by angle-resolved photoemission and above-threshold ionization of helium; the results agree with solutions of the time-dependent Schrödinger equation. The stability limit of the scheme is mainly set by electron-beam energy fluctuations, however, at a level that will not compromise experiments in the XUV. Our results demonstrate the potential to improve the resolution and element selectivity of methods based on polarization shaping and may lead to the development of new coherent control schemes for probing and manipulating core electrons in matter.

  • Item type:Article
    ID code:86266
    Dates:
    Date
    Event
    28 July 2023
    Published
    24 July 2023
    Published Online
    13 June 2023
    Accepted
    27 February 2023
    Submitted
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:25 Jul 2023 08:39
    Last modified:20 Apr 2024 00:53
    URI:https://strathprints.strath.ac.uk/id/eprint/86266
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