Single Photon Generation Using Integrated 2D-material-based Cavity-Emitter Systems*

Localized quantum emitters in certain 2D materials show great promise to realize single photon sources on top of photonic integrated circuits, as these materials allow easy and scalable integration with such circuits. Most research so far was however devoted to the study of free-space quantum emitters. We will present our work on the integration of 2D materials on top of a mature silicon nitride photonic platform and moreover elaborate on our analytical framework to describe the interaction of a 2D-material-based cavity-emitter system with a dielectric photonic waveguide. Rather than minimizing the cavity modal volume, our analysis predicts an optimum modal volume to maximize the single photon generation efficiency into the guided mode of the waveguide, thereby balancing waveguide coupling and spontaneous emission rate enhancement. Numerical simulations on realistic systems allow us to extract optimal parameters for the design of integrated quantum photonic circuitry.