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arXiv · 2302.06340

Ultra-bright single photon source based on an atomically thin material

Jens-Christian Drawer·Victor Nikolaevich Mitryakhin·Hangyong Shan·Sven Stephan·Moritz Gittinger·Lukas Lackner·Bo Han·Gilbert Leibeling·Falk Eilenberger·Rounak Banerjee·Sefaattin Tongay·Kenji Watanabe·Takashi Taniguchi·Christoph Lienau·Martin Silies·Carlos Anton-Solanas·Martin Esmann·Christian Schneider
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Abstract

Solid-state single photon sources are central building blocks in quantum communication networks and on-chip quantum information processing. Atomically thin crystals were established as possible candidates to emit non-classical states of light, however, the performance of monolayer-based single photon sources has so far been lacking behind state-of-the-art devices based on volume crystals. Here, we implement a single photon source based on an atomically thin sheet of WSe2 coupled to a spectrally tunable optical cavity. It is characterized by a high single photon purity with a $g^{(2)}(0)$ value as low as $4.7 \pm 0.7 \%$ and a record-high first lens brightness of linearly polarized photons as large as $65 \pm 4 \%$. Interestingly, the high performance of our devices allows us to observe genuine quantum interference phenomena in a Hong-Ou-Mandel experiment. Our results demonstrate that open cavities and two-dimensional materials constitute an excellent platform for ultra-bright quantum light sources: the unique properties of such two-dimensional materials and the versatility of open cavities open an inspiring avenue for novel quantum optoelectronic devices.

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Jens-Christian Drawer, Victor Nikolaevich Mitryakhin, Hangyong Shan, Sven Stephan, Moritz Gittinger, Lukas Lackner, Bo Han, Gilbert Leibeling, Falk Eilenberger, Rounak Banerjee, Sefaattin Tongay, Kenji Watanabe, Takashi Taniguchi, Christoph Lienau, Martin Silies, Carlos Anton-Solanas, Martin Esmann, Christian Schneider. 2023-02-13. Ultra-bright single photon source based on an atomically thin material. https://doi.org/10.1021/acs.nanolett.3c02584

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