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The hybrid photon-atom integrated circuits, which include photonicmicrocavities and trapped single neutral atom in their evanescent field, are ofgreat potential for quantum information processing. In this platform, the atomsprovide the single-photon nonlinearity and long-lived memory, which arecomplementary to the excellent passive photonics devices in conventionalquantum photonic circuits. In this work, we propose a stable platform forrealizing the hybrid photon-atom circuits based on an unsuspended photonicchip. By introducing high-order modes in the microring, a feasibleevanescent-field trap potential well $\sim0.3\,\mathrm{mK}$ could be obtainedby only $10\,\mathrm{mW}$-level power in the cavity, compared with$100\,\mathrm{mW}$-level power required in the scheme based on fundamentalmodes. Based on our scheme, stable single atom trapping with relatively lowlaser power is feasible for future studies on high-fidelity quantum gates,single-photon sources, as well as many-body quantum physics based on acontrollable atom array in a microcavity.

Proposal for stable atom trapping on a GaN-on-Sapphire chip