Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 37: Plasmonics and Nanooptics 1

O 37.1: Topical Talk

Mittwoch, 7. September 2022, 10:30–11:00, H3

Merging integrated photonics with free-electron beams — •Armin Feist — Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany

The coherent coupling of electrons and light is at the heart of free-electron quantum optics [1]. However, fully exploring its capabilities requires supreme control over the electron beam and optical quantum states involved. This suggests combining integrated photonics with electron microscopy.

In this talk, I will briefly introduce the basic principles and selected applications of inelastic electron-light scattering in an ultrafast transmission electron microscope (UTEM) [2,3], including the nanoscale imaging of confined optical modes and shaping of electron beams in space and time [4].

Recent progress in coupling single electrons to high-Q integrated photonic microresonators will be discussed, enabling highly efficient continuous-wave optical phase modulation of electron beams and nanoscale-µeV spectroscopy of a photonic mode [5]. Furthermore, spontaneous scattering at the empty resonator modes creates electron-photon pair states [6], opening a pathway towards a new class of heralded single-electron or Fock-state photon sources.

[1] K. Wang et al., Optics & Photonics News 31, 35 (2020). [2] Barwick et al., Nature 462, 902 (2009). [3] A. Feist et al., Nature 521, 200 (2015). [4] F.J. García de Abajo & V. Di Giulio, ACS Photonics 8, 945 (2021). [5] J.W. Henke et al., Nature 600, 653 (2021). [6] A. Feist et al., arXiv:2202.12821 (2022).