Inverse-designed nanophotonic resonators for cavity QED in diamond

Nanophotonic platforms are key ingredients for scalable solid-state quantum information processing. In particular, diamond nanophotonic resonators are central instruments for the realization of quantum memories. Over the past decade, inverse design has emerged as a promising method for various photonics applications, yielding non-intuitive device geometries that exhibit a comparable if not superior performance relative to their conventional counterparts. However, as a material, diamond has remained elusive for inverse design methodologies due to limitations in processing and fabrication. The recent advent of thin-film diamond on insulator material now allows for the full potential of inverse design. In this study, we employ photonic inverse design methodologies to explore novel resonator geometries intended for thin-film diamond platforms.

(*)The authors wish to thank the SPINS Photonics team, whose help has been vital for this research. All devices in this publication were designed with fdtd-z, SPINS Photonics' open-source, GPU-accelerated FDTD simulation engine.