Purcell-Enhanced Single Photon Source Based on a Deterministically Placed WSe<sub>2</sub> Monolayer Quantum Dot in a Circular Bragg Grating Cavity.
basic_science · Level V
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- Record sourced from PubMed, PMID 34048254.
- Also identified by DOI 10.1021/acs.nanolett.1c00978 and PMC identifier 10573669.
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Abstract
We demonstrate a deterministic Purcell-enhanced single photon source realized by integrating an atomically thin WSe<sub>2</sub> layer with a circular Bragg grating cavity. The cavity significantly enhances the photoluminescence from the atomically thin layer and supports single photon generation with <i>g</i><sup>(2)</sup>(0) < 0.25. We observe a consistent increase of the spontaneous emission rate for WSe<sub>2</sub> emitters located in the center of the Bragg grating cavity. These WSe<sub>2</sub> 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.