Purcell-Enhanced Single Photon Source Based on a Deterministically Placed WSe2 Monolayer Quantum Dot in a Circular Bragg Grating Cavity

We demonstrate a deterministic Purcell-enhanced single photon source realized by integrating an atomically thin WSe2 layer with a circular Bragg grating cavity. The cavity significantly enhances the photoluminescence from the atomically thin layer and supports single photon generation with g((2)) (0) < 0.25. We observe a consistent increase of the spontaneous emission rate for WSe2 emitters located in the center of the Bragg grating cavity. These WSe2 emitters are self-aligned and deterministically coupled to such a broadband cavity, configuring a new generation of deterministic single photon sources, characterized by their simple and low-cost production and intrinsic scalability.

Automated summary

A deterministic Purcell-enhanced single photon source has been demonstrated by integrating an atomically thin WSe2 layer with a circular Bragg grating cavity. This new generation of deterministic single photon sources features simple and low-cost production as well as intrinsic scalability, with the WSe2 emitters self-aligned and deterministically coupled to the broadband cavity.