Microring Resonators on a Suspended Membrane Circuit for Atom–Light Interactions

Atoms that are trapped and interfaced with light in nanophotonic circuits form an exciting new platform for applications and fundamental research in quantum optics and many-body physics. The ability to induce tunable long-range atom-atom interactions with photons, and the formation of an organized atom–nanophotonic hybrid lattice presents a novel opportunity to explore collective quantum optics and many-body physics. Our system is based on high quality silicon nitride microring resonators fabricated on a transparent membrane substrate. This platform is compatible with laser cooling and trapping with cold atoms and with potentially high cooperativity parameters C $\approx$ 500, thus holding great promises as an on-chip atom cavity QED platform. We present our on-going experiment effort for coupling atoms to a micro-ring and further fabrication improvements for quality factor for creating strong atom-photon coupling.