Solid-state photonic integrated circuits (PICs) are a key component in the technological realization of quantum technologies. The integration of active interfaces between quantum emitters and waveguides, as well as other components enabling active light-matter interaction, is crucial within PICs.
In this context, so-called photonic crystals are used as optical resonators to enhance the emission rate of integrated emitters. However, these resonators are typically spectrally narrowband, passive, and exhibit high latency depending on their quality factor (Q-factor). Therefore, we are particularly interested in approaches that can achieve broadband emission rate enhancement while also enabling external control of integrated emitters.

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Güsken, N.A., Fu, M., Zapf, M. et al. Emission enhancement of erbium in a reverse nanofocusing waveguide. Nat Commun 14, 2719 (2023). https://doi.org/10.1038/s41467-023-38262-6

Wang, J., Sciarrino, F., Laing, A. et al. Integrated photonic quantum technologies. Nat. Photonics 14, 273–284 (2020). https://doi.org/10.1038/s41566-019-0532-1

Pelucchi, E., Fagas, G., Aharonovich, I. et al. The potential and global outlook of integrated photonics for quantum technologies. Nat Rev Phys 4, 194–208 (2022). https://doi.org/10.1038/s42254-021-00398-z