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Merging transformation optics with electron-driven photon sources

Author

Listed:
  • Nahid Talebi

    (Stuttgart Center for Electron Microscopy, Max Planck Institute for Solid State Research)

  • Sophie Meuret

    (Center for Nanophotonics, AMOLF)

  • Surong Guo

    (Stuttgart Center for Electron Microscopy, Max Planck Institute for Solid State Research)

  • Mario Hentschel

    (University of Stuttgart)

  • Albert Polman

    (Center for Nanophotonics, AMOLF)

  • Harald Giessen

    (University of Stuttgart)

  • Peter A. Aken

    (Stuttgart Center for Electron Microscopy, Max Planck Institute for Solid State Research)

Abstract

Relativistic electron beams create optical radiation when interacting with tailored nanostructures. This phenomenon has been so far used to design grating-based and holographic electron-driven photon sources. It has been proposed recently that such sources can be used for hybrid electron- and light-based spectroscopy techniques. However, this demands the design of a thin-film source suitable for electron-microscopy applications. Here, we present a mesoscopic structure composed of an array of nanoscale holes in a gold film which is designed using transformation optics and delivers ultrashort chirped electromagnetic wave packets upon 30–200 keV electron irradiation. The femtosecond photon bunches result from coherent scattering of surface plasmon polaritons with hyperbolic dispersion. They decay by radiation in a broad spectral band which is focused into a 1.5 micrometer beam waist. The focusing ability and broadband nature of this photon source will initiate applications in ultrafast spectral interferometry techniques.

Suggested Citation

  • Nahid Talebi & Sophie Meuret & Surong Guo & Mario Hentschel & Albert Polman & Harald Giessen & Peter A. Aken, 2019. "Merging transformation optics with electron-driven photon sources," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08488-4
    DOI: 10.1038/s41467-019-08488-4
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