SKM 2023 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 10: Focus Session: Progress in Hybrid Phononic Quantum Technologies II

HL 10.9: Talk

Monday, March 27, 2023, 18:00–18:15, POT 151

Coupling single electrons and photons at photonic-chip based microresonators — •Armin Feist^1,2, Guanhao Huang^3,4, Germaine Arend^1,2, Yujia Yang^3,4, Jan-Wilke Henke^1,2, Arslan Sajid Raja^3,4, F. Jasmin Kappert^1,2, Rui Ning Wang^3,4, Hugo Lourenço-Martins^1,2, Qiu Zheru^3,4, Junqiu Liu^1,2, Ofer Kfir^3,4, Tobias J. Kippenberg^3,4, and Claus Ropers^1,2 — ¹MPI for Multidisciplinary Sciences, Göttingen, Germany — ²4th Physical Institute, University of Göttingen, Germany — ³Institute of Physics, Swiss Federal Institute of Technology Lausanne, Switzerland — ⁴Center for Quantum Science and Engineering, Swiss Federal Institute of Technology Lausanne, Switzerland

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 a high-Q integrated photonic microresonator [2]. Spontaneous scattering at empty resonator modes creates electron-photon pair states [3], enabling single-particle heralding schemes and noise-supressed mode imaging. 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] X. Bendaña et al., Nano Lett. 11, 5099 (2011).