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Purcell–enhanced single photon source based on a deterministically placed WSe2 monolayer quantum dot in a circular Bragg grating cavity
Published
Author(s)
Oliver Iff, Quirin Buchinger, Magdalena Moczala-Dusanowska, Martin Kamp, Simon Betzold, Marcelo I. Davanco, Kartik Srinivasan, Sefaattin Tongay, Carlos Anton-Solanas, Sven Hofling, 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
Iff, O.
, Buchinger, Q.
, Moczala-Dusanowska, M.
, Kamp, M.
, Betzold, S.
, Davanco, M.
, Srinivasan, K.
, Tongay, S.
, Anton-Solanas, C.
, Hofling, S.
and Schneider, C.
(2021),
Purcell–enhanced single photon source based on a deterministically placed WSe2 monolayer quantum dot in a circular Bragg grating cavity, Nano Letters, [online], https://doi.org/10.1021/acs.nanolett.1c00978, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=931792
(Accessed October 9, 2025)