Purcell-Enhanced Single Photon Source Based on a Deterministically Placed WSe<sub>2</sub> Monolayer Quantum Dot in a Circular Bragg Grating Cavity
Oliver Iff, Quirin Buchinger, Magdalena Moczała-Dusanowska, M. Kamp, Simon Betzold, Marcelo Davanço, Kartik Srinivasan, Sefaattin Tongay, C. Antón, Sven Höfling, Christian Schneider
Abstract
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.