  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
$1.55\times10^6$ around the optical transition of $^{87}$Rb at $~780$ nm. This
Q is achieved without annealing the devices at high temperatures, enabling
future fully integrated platforms containing optoelectronic circuitry as well.
The estimated single-photon Rabi frequency (2g) is
${2\boldsymbol{\pi}}\times$64 MHz at a height of 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 strongly interact with our resonator, allowing
for the detection of single-atom transits and the realization of scalable
single-atom photonic devices. Racetrack resonators with a similar Q can be used
to detect thermal atomic beams with velocities around 300 m/s.
