Large-scale entanglement of nitrogen-vacancy (NV) centers in diamond will require integration of NV centers with optical networks. Toward this goal, we present the fabrication of single-crystalline gallium phosphide (GaP) resonator-waveguide coupled structures on diamond. We demonstrate coupling between 1 {\mu}m diameter GaP disk resonators and waveguides with a loaded Q factor of 3,800, and evaluate their potential for efficient photon collection if integrated with single photon emitters. This work opens a path toward scalable NV entanglement in the hybrid GaP/diamond platform, with the potential to integrate on-chip photon collection, switching, and detection for applications in quantum information processing.
@article{arxiv.1404.5974,
title = {Waveguide-integrated single-crystalline GaP resonators on diamond},
author = {Nicole Thomas and Russell J. Barbour and Yuncheng Song and Minjoo Larry Lee and Kai-Mei C. Fu},
journal= {arXiv preprint arXiv:1404.5974},
year = {2015}
}