Abstract

An integrated photonic platform is proposed for strong interactions between atomic beams and annealing-free high-quality-factor $(\!Q)$ microresonators. We fabricated a thin-film, air-clad SiN microresonator with a loaded $\!Q$ of $1.55 \times {10^6}$ around the optical transition of  ${^{87}{\rm Rb}}$ at 780 nm. This $\!Q$ is achieved without annealing the devices at high temperatures, enabling future fully integrated platforms containing optoelectronic circuitry. The estimated single-photon Rabi frequency (2g) is $2\pi \times 64\;{\rm MHz}$ 100 nm above the resonator. Our simulation result indicates that miniature atomic beams with a longitudinal speed of 0.2 m/s to 30 m/s will interact strongly with our resonator, allowing for the detection of single-atom transits and realization of scalable single-atom photonic devices. Interactions between racetrack resonators and thermal atomic beams are also simulated.

© 2020 Optical Society of America

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