Inverse-designed cavity QED with tin-vacancy centers in diamond

We present optimal inverse-designs of nanophotonic resonators for cavity quantum electrodynamics with diamond color centers. Color centers, optically active spin defects in diamond, are promising candidates for applications in quantum information technologies. However, their potential is limited by low photon collection rates, which hinder entanglement generation and preclude the realization of scalable quantum networks. In this work, we employ the latest developments in inverse design capabilities to optimize diamond Fabry-Perot microcavities. Our devices achieve quality factors exceeding 10^4 and small mode volumes, driving emitters into the strong coupling regime. We provide a systematic study of inverse-designed diamond nanocavities, demonstrating Purcell enhancement, enforcing minimal feature sizes to meet diamond fabrication constraints, modeling dipole-field interactions due to different lattice orientations, and using inverse design algorithms to improve existing, traditional cavity design templates.