Regensburg 2025 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 18: Focus Session: Nanoscale Light-matter Interaction I
HL 18.6: Vortrag
Dienstag, 18. März 2025, 12:15–12:30, H17
Heralding non-classical light by tailored free-electron interactions with photonic modes — •Armin Feist1,2, Guanhao Huang3,4, Germaine Arend1,2, Yujia Yang3,4, Jan-Wilke Henke1,2, Zheru Qiu3,4, Hao Jeng1,2, Arslan Sajid Raja3,4, Rudolf Haindl1,2, Rui Ning Wang3,4, Tobias J. Kippenberg3,4, and Claus Ropers1,2 — 1Max Planck Institute for Multidisciplinary Sciences, Göttingen, DE — 24th Physical Institute, University of Göttingen, DE — 3Institute of Physics, EPFL, Lausanne, CH — 4Center for Quantum Science and Engineering, EPFL, Lausanne, CH
Integrated photonics facilitates control over fundamental light-matter interactions in manifold quantum systems. Extending these capabilities to electron beams [1] fosters free-electron quantum optics.
Here, we show the coupling of single electrons and photons at an integrated photonics waveguide [2,3]. Spontaneous scattering of the nanoscale-focused electron beam at empty optical modes creates multi-photon superposition states. Energy-selective and event-based electron detection enables heralding non-classical light, which we characterize by intensity correlations in a Hanbury Brown and Twiss (HBT) setup, showing high-fidelity single-photon generation [3].
This provides a pathway toward novel hybrid quantum technology with entangled electrons and photons, as well as the capability for quantum-enhanced electron imaging and Fock-state photon sources.
[1] J.-W. Henke et al., Nature 600, 653 (2021). [2] A. Feist et al., Science 377, 777 (2022). [3] G. Arend et al., arXiv:2409.11300 (2024)
Keywords: ultrafast electron microscopy; integrated photonics; cathodoluminescence; nanoscale electron-light coupling