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MON: Monday Contributed Sessions
MON 5: Optical Quantum Devices
MON 5.4: Vortrag
Montag, 8. September 2025, 15:00–15:15, ZHG006
A Free-Electron-Driven Quantum Light Source — •F. Jasmin Kappert1,2, Armin Feist1,2, Guanhao Huang3, Germaine Arend1,2, Yujia Yang3, Jan-Wilke Henke1,2, Arslan Sajid Raja3, Rui Ning Wang3, Hugo Lourenco-Martins1,2, Rudolf Haindl1,2, Zheru Qiu3, Junqiu Liu3, Ofer Kfir1,2, Tobias J. Kippenberg3, and Claus Ropers1,2 — 1MPI for Multidisciplinary Sciences, Göttingen, Germany — 24th Physical Institute, University of Göttingen, Germany — 3Institute of Physics, Swiss Federal Institute of Technology Lausanne (EPFL), Switzerland
Tailored nonclassical light is essential for photonic quantum technologies, yet generating complex optical states remains challenging. Inelastic free-electron scattering offers a promising new method for creating parametric and wavelength-tunable quantum light, particularly through coherent cathodoluminescence.
Here, we present a novel platform that efficiently couples free-electron beams to silicon nitride integrated photonics [1], enabling the generation of electron-photon pair states [2]. By post-selecting electrons with quantized energy loss, we can herald nonclassical single and multi-photon states [2,3]. This establishes a versatile source of tailored quantum light, potentially leading to a new class of hybrid quantum technology that combines electrons and photons.
[1] J.-W. Henke, FJK et al., Nature 600, 653 (2021)
[2] A. Feist, FJK et al., Science 377, 777 (2022)
[3] G. Arend et al., arXiv:2409.11300 (2024)
Keywords: free-electron quantum optics; quantum light source; single photon source; coherent cathodoluminescence