Monolayer-Based Single-Photon Source in a Liquid-Helium-Free Open Cavity Featuring 65% Brightness and Quantum Coherence
- Institute of Physics, Carl von Ossietzky University Oldenburg, 26129 Oldenburg, Germany
- Institute of Physics, Carl von Ossietzky University Oldenburg, 26129 Oldenburg, Germany, University of Applied Sciences Emden/Leer, 26723 Emden, Germany
- Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, 07743 Jena, Germany, Fraunhofer-Institute for Applied Optics and Precision Engineering IOF, 07743 Jena, Germany, Max-Planck-School of Photonics, 07743 Jena, Germany
- Materials Science and Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona 85287, United States
- Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
- University of Applied Sciences Emden/Leer, 26723 Emden, Germany
- Depto. de Física de Materiales, Instituto Nicolás Cabrera, Instituto de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
Solid-state single-photon sources are central building blocks in quantum information processing. Atomically thin crystals have emerged as sources of nonclassical light; however, they perform below the state-of-the-art devices based on volume crystals. Here, we implement a bright single-photon source based on an atomically thin sheet of WSe2 coupled to a tunable optical cavity in a liquid-helium-free cryostat without the further need for active stabilization. Its performance is characterized by high single-photon purity (g(2)(0) = 4.7 ± 0.7%) and record-high, first-lens brightness of linearly polarized photons of 65 ± 4%, representing a decisive step toward real-world quantum applications. The high performance of our devices allows us to observe two-photon interference in a Hong–Ou–Mandel experiment with 2% visibility limited by the emitter coherence time and setup resolution. Our results thus demonstrate that the combination of the unique properties of two-dimensional materials and versatile open cavities emerges as an inspiring avenue for novel quantum optoelectronic devices.
- Research Organization:
- Carl von Ossietzky University Oldenburg (Germany)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DOE-SC0020653; SC0020653
- OSTI ID:
- 1999304
- Alternate ID(s):
- OSTI ID: 2006575
- Journal Information:
- Nano Letters, Journal Name: Nano Letters Vol. 23 Journal Issue: 18; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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