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Strong transient magnetic fields induced by THz-driven plasmons in graphene disks

Author

Listed:
  • Jeong Woo Han

    (Universität Duisburg-Essen, Fakultät für Physik)

  • Pavlo Sai

    (CENTERA Laboratories, Institute of High Pressure Physics PAS)

  • Dmytro B. But

    (CENTERA Laboratories, Institute of High Pressure Physics PAS)

  • Ece Uykur

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Stephan Winnerl

    (Helmholtz-Zentrum Dresden-Rossendorf)

  • Gagan Kumar

    (Indian Institute of Technology)

  • Matthew L. Chin

    (University of Maryland)

  • Rachael L. Myers-Ward

    (U.S. Naval Research Laboratory)

  • Matthew T. Dejarld

    (U.S. Naval Research Laboratory)

  • Kevin M. Daniels

    (University of Maryland)

  • Thomas E. Murphy

    (University of Maryland)

  • Wojciech Knap

    (CENTERA Laboratories, Institute of High Pressure Physics PAS)

  • Martin Mittendorff

    (Universität Duisburg-Essen, Fakultät für Physik)

Abstract

Strong circularly polarized excitation opens up the possibility to generate and control effective magnetic fields in solid state systems, e.g., via the optical inverse Faraday effect or the phonon inverse Faraday effect. While these effects rely on material properties that can be tailored only to a limited degree, plasmonic resonances can be fully controlled by choosing proper dimensions and carrier concentrations. Plasmon resonances provide new degrees of freedom that can be used to tune or enhance the light-induced magnetic field in engineered metamaterials. Here we employ graphene disks to demonstrate light-induced transient magnetic fields from a plasmonic circular current with extremely high efficiency. The effective magnetic field at the plasmon resonance frequency of the graphene disks (3.5 THz) is evidenced by a strong ( ~ 1°) ultrafast Faraday rotation ( ~ 20 ps). In accordance with reference measurements and simulations, we estimated the strength of the induced magnetic field to be on the order of 0.7 T under a moderate pump fluence of about 440 nJ cm−2.

Suggested Citation

  • Jeong Woo Han & Pavlo Sai & Dmytro B. But & Ece Uykur & Stephan Winnerl & Gagan Kumar & Matthew L. Chin & Rachael L. Myers-Ward & Matthew T. Dejarld & Kevin M. Daniels & Thomas E. Murphy & Wojciech Kn, 2023. "Strong transient magnetic fields induced by THz-driven plasmons in graphene disks," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43412-x
    DOI: 10.1038/s41467-023-43412-x
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    References listed on IDEAS

    as
    1. A. V. Kimel & A. Kirilyuk & P. A. Usachev & R. V. Pisarev & A. M. Balbashov & Th. Rasing, 2005. "Ultrafast non-thermal control of magnetization by instantaneous photomagnetic pulses," Nature, Nature, vol. 435(7042), pages 655-657, June.
    2. Jean-Marie Poumirol & Peter Q. Liu & Tetiana M. Slipchenko & Alexey Y. Nikitin & Luis Martin-Moreno & Jérôme Faist & Alexey B. Kuzmenko, 2017. "Electrically controlled terahertz magneto-optical phenomena in continuous and patterned graphene," Nature Communications, Nature, vol. 8(1), pages 1-6, April.
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