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Ultrasensitive probing of plasmonic hot electron occupancies

Author

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  • Judit Budai

    (ELI-ALPS, ELI-HU Non-Profit Ltd.
    University of Szeged)

  • Zsuzsanna Pápa

    (ELI-ALPS, ELI-HU Non-Profit Ltd.
    Wigner Research Centre for Physics)

  • Péter Petrik

    (Centre for Energy Research)

  • Péter Dombi

    (ELI-ALPS, ELI-HU Non-Profit Ltd.
    Wigner Research Centre for Physics)

Abstract

Non-thermal and thermal carrier populations in plasmonic systems raised significant interest in contemporary fundamental and applied physics. Although the theoretical description predicts not only the energies but also the location of the generated carriers, the experimental justification of these theories is still lacking. Here, we demonstrate experimentally that upon the optical excitation of surface plasmon polaritons, a non-thermal electron population appears in the topmost domain of the plasmonic film directly coupled to the local fields. The applied all-optical method is based on spectroscopic ellipsometric determination of the dielectric function, allowing us to obtain in-depth information on surface plasmon induced changes of the directly related electron occupancies. The ultrahigh sensitivity of our method allows us to capture the signatures of changes induced by electron-electron scattering processes with ultrafast decay times. These experiments shed light on the build-up of plasmonic hot electron population in nanoscale media.

Suggested Citation

  • Judit Budai & Zsuzsanna Pápa & Péter Petrik & Péter Dombi, 2022. "Ultrasensitive probing of plasmonic hot electron occupancies," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
  • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34554-5
    DOI: 10.1038/s41467-022-34554-5
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    References listed on IDEAS

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    1. Tal Heilpern & Manoj Manjare & Alexander O. Govorov & Gary P. Wiederrecht & Stephen K. Gray & Hayk Harutyunyan, 2018. "Determination of hot carrier energy distributions from inversion of ultrafast pump-probe reflectivity measurements," Nature Communications, Nature, vol. 9(1), pages 1-6, December.
    2. Christoph Karnetzky & Philipp Zimmermann & Christopher Trummer & Carolina Duque Sierra & Martin Wörle & Reinhard Kienberger & Alexander Holleitner, 2018. "Towards femtosecond on-chip electronics based on plasmonic hot electron nano-emitters," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
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    Cited by:

    1. Vito Coviello & Denis Badocco & Paolo Pastore & Martina Fracchia & Paolo Ghigna & Alessandro Martucci & Daniel Forrer & Vincenzo Amendola, 2024. "Accurate prediction of the optical properties of nanoalloys with both plasmonic and magnetic elements," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    2. Robert Lemasters & Manoj Manjare & Ryan Freeman & Feng Wang & Luka Guy Pierce & Gordon Hua & Sergei Urazhdin & Hayk Harutyunyan, 2024. "Non-thermal emission in gap-mode plasmon photoluminescence," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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