Efficiently-coupled microring circuit for on-chip cavity QED with trapped atoms
Authors: Tzu-Han Chang, Xinchao Zhou, Ming Zhu, Brian M. Fields, Chen-Lung Hung
Journal Ref: Appl. Phys. Lett. 117, 174001 (2020); arXiv:2008.04263
Abstract:
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.
