Coupling ideality of free electrons with photonic integrated waveguides

Huang, Guanhao; Engelsen, Nils J.; Kfir, Ofer; Ropers, Claus; Kippenberg, Tobias J.

doi:10.48550/arXiv.2206.08098

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Coupling ideality of free electrons with photonic integrated waveguides

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Ropers, Claus
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society;

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Citation

Huang, G., Engelsen, N. J., Kfir, O., Ropers, C., & Kippenberg, T. J. (2022). Coupling ideality of free electrons with photonic integrated waveguides. arXiv. doi:10.48550/arXiv.2206.08098.

Cite as: https://hdl.handle.net/21.11116/0000-000B-5407-F

Abstract

Recently, integrated photonics has brought new capabilities to electron microscopy and been used to demonstrate efficient electron phase modulation and electron-photon correlations. Here, we quantitatively analyze the interaction strength between a free electron and a photonic integrated circuit with a heterogeneous structure. We adopt a dissipative QED treatment and show that with proper electron beam positioning and waveguide geometry, one can achieve near-unity coupling ideality to a well-defined spatial-temporal waveguide mode. Furthermore, we show that the frequency and waveform of the coupled mode can be tailored to the application. These features show that photonic integrated waveguides are a promising platform for free-electron quantum optics with applications like high-fidelity electron-photon entanglement, heralded single-electron and photon state synthesis.