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μeV electron spectromicroscopy using free-space light

Author

Listed:
  • Yves Auad

    (Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides)

  • Eduardo J. C. Dias

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Marcel Tencé

    (Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides)

  • Jean-Denis Blazit

    (Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides)

  • Xiaoyan Li

    (Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides)

  • Luiz Fernando Zagonel

    (University of Campinas - UNICAMP)

  • Odile Stéphan

    (Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides)

  • Luiz H. G. Tizei

    (Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides)

  • F. Javier García de Abajo

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology
    ICREA-Institució Catalana de Recerca i Estudis Avançats)

  • Mathieu Kociak

    (Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides)

Abstract

The synergy between free electrons and light has recently been leveraged to reach an impressive degree of simultaneous spatial and spectral resolution, enabling applications in microscopy and quantum optics. However, the required combination of electron optics and light injection into the spectrally narrow modes of arbitrary specimens remains a challenge. Here, we demonstrate microelectronvolt spectral resolution with a sub-nanometer probe of photonic modes with quality factors as high as 104. We rely on mode matching of a tightly focused laser beam to whispering gallery modes to achieve a 108-fold increase in light-electron coupling efficiency. By adapting the shape and size of free-space optical beams to address specific physical questions, our approach allows us to interrogate any type of photonic structure with unprecedented spectral and spatial detail.

Suggested Citation

  • Yves Auad & Eduardo J. C. Dias & Marcel Tencé & Jean-Denis Blazit & Xiaoyan Li & Luiz Fernando Zagonel & Odile Stéphan & Luiz H. G. Tizei & F. Javier García de Abajo & Mathieu Kociak, 2023. "μeV electron spectromicroscopy using free-space light," Nature Communications, Nature, vol. 14(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39979-0
    DOI: 10.1038/s41467-023-39979-0
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    References listed on IDEAS

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    1. Ondrej L. Krivanek & Tracy C. Lovejoy & Niklas Dellby & Toshihiro Aoki & R. W. Carpenter & Peter Rez & Emmanuel Soignard & Jiangtao Zhu & Philip E. Batson & Maureen J. Lagos & Ray F. Egerton & Peter A, 2014. "Vibrational spectroscopy in the electron microscope," Nature, Nature, vol. 514(7521), pages 209-212, October.
    2. Maureen J. Lagos & Andreas Trügler & Ulrich Hohenester & Philip E. Batson, 2017. "Mapping vibrational surface and bulk modes in a single nanocube," Nature, Nature, vol. 543(7646), pages 529-532, March.
    3. Armin Feist & Katharina E. Echternkamp & Jakob Schauss & Sergey V. Yalunin & Sascha Schäfer & Claus Ropers, 2015. "Quantum coherent optical phase modulation in an ultrafast transmission electron microscope," Nature, Nature, vol. 521(7551), pages 200-203, May.
    4. P. E. Batson & N. Dellby & O. L. Krivanek, 2002. "Sub-ångstrom resolution using aberration corrected electron optics," Nature, Nature, vol. 418(6898), pages 617-620, August.
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