We present a complete fabrication study of an efficiently-coupled microring optical circuit tailored for cavity quantum electrodynamics (QED) with trapped atoms. The microring structures are fabricated on a transparent membrane with high in-vacuum fiber edge-coupling efficiency in a broad frequency band. In addition, a bus waveguide pulley coupler realizes critical coupling to the microrings at both of the cesium D-line frequencies, while high coupling efficiency is achieved at the cesium 'magic' wavelengths for creating a lattice of two-color evanescent field traps above a microring. The presented platform holds promises for realizing a robust atom-nanophotonics hybrid quantum device.
@article{arxiv.2008.04263,
title = {Efficiently-coupled microring circuit for on-chip cavity QED with trapped atoms},
author = {Tzu-Han Chang and Xinchao Zhou and Ming Zhu and Brian M. Fields and Chen-Lung Hung},
journal= {arXiv preprint arXiv:2008.04263},
year = {2020}
}