We propose a scalable design for a spin-photon interface to a color center in a diamond microdisk. The design consists of a silicon oxynitride hexagonal lattice overlaid on a diamond microdisk to enable vertical emission from the microdisk into low-numerical aperture modes, with quantum efficiencies as high as 45\% for a tin vacancy (SnV) center. Our design is robust to manufacturing errors, potentially enabling large scale fabrication of quantum emitters coupled to optical collection modes. We also introduce a novel approach for optimizing the free space performance of a complex structure using a dipole model, achieving comparable results to full-wave finite difference time domain simulations with a 650,000 times reduction in computational time.
@article{arxiv.2312.05638,
title = {Alignment-Free Coupling to Arrays of Diamond Microdisk Cavities for Scalable Spin-Photon Interfaces},
author = {Helaman R. Flores and Samuel R. Layton and Dirk Englund and Ryan M. Camacho},
journal= {arXiv preprint arXiv:2312.05638},
year = {2023}
}