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Plasmonic layer-selective all-optical switching of magnetization with nanometer resolution

Author

Listed:
  • D. O. Ignatyeva

    (Lomonosov Moscow State University
    Russian Quantum Center)

  • C. S. Davies

    (Radboud University, Institute for Molecules and Materials
    FELIX Laboratory, Radboud University)

  • D. A. Sylgacheva

    (Lomonosov Moscow State University
    Russian Quantum Center)

  • A. Tsukamoto

    (Nihon University)

  • H. Yoshikawa

    (Nihon University)

  • P. O. Kapralov

    (Russian Quantum Center)

  • A. Kirilyuk

    (FELIX Laboratory, Radboud University)

  • V. I. Belotelov

    (Lomonosov Moscow State University
    Russian Quantum Center)

  • A. V. Kimel

    (Radboud University, Institute for Molecules and Materials)

Abstract

All-optical magnetization reversal with femtosecond laser pulses facilitates the fastest and least dissipative magnetic recording, but writing magnetic bits with spatial resolution better than the wavelength of light has so far been seen as a major challenge. Here, we demonstrate that a single femtosecond laser pulse of wavelength 800 nm can be used to toggle the magnetization exclusively within one of two 10-nm thick magnetic nanolayers, separated by just 80 nm, without affecting the other one. The choice of the addressed layer is enabled by the excitation of a plasmon-polariton at a targeted interface of the nanostructure, and realized merely by rotating the polarization-axis of the linearly-polarized ultrashort optical pulse by 90°. Our results unveil a robust tool that can be deployed to reliably switch magnetization in targeted nanolayers of heterostructures, and paves the way to increasing the storage density of opto-magnetic recording by a factor of at least 2.

Suggested Citation

  • D. O. Ignatyeva & C. S. Davies & D. A. Sylgacheva & A. Tsukamoto & H. Yoshikawa & P. O. Kapralov & A. Kirilyuk & V. I. Belotelov & A. V. Kimel, 2019. "Plasmonic layer-selective all-optical switching of magnetization with nanometer resolution," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12699-0
    DOI: 10.1038/s41467-019-12699-0
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