Probing Enhanced Emission and Coupling of Silicon-Vacancy Centers in Zero-Index Metamaterials

Diamond nanophotonic structures with implanted silicon-vacancy centers have proved a fruitful platform for cavity QED, and strong couplings have been achieved between cavity and emitters. With density-of-states engineering through more exotic dispersion relations, zero-index metamaterials have been proposed as structures that can allow for enhanced (or suppressed) collective emission or enhanced coupling for emitters. In particular, Dirac cone zero-index metamaterials have finite impendence and minimal optical wavepacket distortion, but still show infinite phase velocity along the waveguide direction, producing a constant phase front even among spatially separated emitters. In one-dimensional Dirac cone zero-index metamaterials, density of states can be enhanced as well, loosening restrictions on emitter frequency indistinguishability for emitters with lifetime-limited coherence times. In this talk, I will present simulation results showing quantum interactions of multiple silicon-vacancy emitters evolving in a leaky Dirac cone metamaterial environment. Simulations show promise for use of zero-index metamaterials in quantum network nodes for information-theoretically secure quantum communication.