Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 44: Quantum Information II
Q 44.7: Talk
Thursday, March 14, 2024, 12:30–12:45, HS 1199
Free-electron cavity-photon interaction via integrated photonics — •Germaine Arend1,2, Yujia Yang3,4, Armin Feist1,2, Guanhao Huang3,4, Jan-Wilke Henke1,2, Arslan Sajid Raja3,4, F. Jasmin Kappert1,2, Rui Ning Wang3,4, Hugo Lourenco-Martins1,2, Junqiu Liu3,4, Ofer Kfir1,2, Tobias J. Kippenberg3,4, and Claus Ropers1,2 — 1Max Planck Institute for Multidisciplinary Sciences, D-37077 Göttingen, Germany — 2Georg-August-Universität Göttingen, D-37077 Göttingen, Germany — 3Swiss Federal Institute of Technology Lausanne (EPFL), CH-1015 Lausanne, Switzerland — 4Center for Quantum Science and Engineering, EPFL, Lausanne, Switzerland
Quantum communication largely relies on the generation of photon pairs as well as their interactions with different quantum systems. Coupling of single photons with free electrons, a potential candidate, has been hampered due to limited control over the optical states and the lack of coincidence detection capabilities. Here, we generate electron-photon pairs by inelastic scattering of free electrons with the evanescent optical field of a Si3N4 resonator and detect the generated photons, as well as the corresponding electron energy loss. The temporal correlation of both particles demonstrates a distinct peak of coincidence events, highlighting their common origin [1]. The connection between energy loss and photon number enables post-selection onto single, or even n-photon states. This setup enables the exploration of new experimental concepts in free-electron quantum optics. [1] A. Feist, G. Arend et al., Science 377, 777 (2022)
Keywords: Single Photon Source; Electron-Photon Scattering; Transmission Electron Microscope; Coincidence Gating