title: Waveguide-integrated single-crystalline GaP resonators on diamond.
abstract: 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 μm 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.
authors.forename: Nicole
authors.initials: N
authors.lastname: Thomas
authors.forename: Russell J
authors.initials: RJ
authors.lastname: Barbour
authors.forename: Yuncheng
authors.initials: Y
authors.lastname: Song
authors.forename: Minjoo Larry
authors.initials: ML
authors.lastname: Lee
authors.forename: Kai-Mei C
authors.initials: KM
authors.lastname: Fu