Purcell-enhanced single photon source based on a deterministically placed WSe${}_2$ monolayer quantum dot in a circular Bragg grating cavity

Abstract

We demonstrate a deterministic Purcell-enhanced single-photon source realized by integrating an atomically thin WSe${}_2$ 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 WSe${}_2$ emitters located in the center of the Bragg grating cavity. These WSe${}_2$ 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.

arXiv comment11 pages, 3 figures in the main text, 6 figures in the supplementary material

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