ArticleScience advances2025
Tunable polarization entangled photon-pair source in rhombohedral boron nitride.
Article in Science advances, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- In-line fiber-integrated photon-pair generation from van der Waals crystals.Nano convergence · 2026Article
- Nonlinear quantum light source with van der Waals ferroelectric NbOXNature communications · 2026Article
- Hyperentanglement in Nanophotonic Systems With Discrete Rotational Symmetry.Nanophotonics (Berlin, Germany) · 2026Article
- Electrically and Geometrically Tunable Photon Pair Entanglement from Ferroelectric Nematic Liquid Crystal.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- Nonlinearity symmetry breaking for generating tunable quantum entanglement in semiconductor metasurfaces.Science advances · 2025Article
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Authors and funding
8 authors.
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Abstract
Entangled photon-pair sources are pivotal in various quantum applications. Miniaturizing the quantum devices to meet the requirement in limited space applications drives the search for ultracompact entangled photon-pair sources. The rise of two-dimensional (2D) semiconductors has been demonstrated as ultracompact entangled photon-pair sources. However, the photon-pair generation rate and purity are relatively low, and the strong photoluminescence in 2D semiconductors also makes the operational wavelength range limited. Here, we use the spontaneous parametric down conversion (SPDC) of rhombohedral boron nitride (rBN) as a polarization entangled photon-pair source. We have achieved a generation rate of more than 120 hertz (a record-high SPDC coincidence rate with 2D materials) and a high-purity photon-pair generation with a coincidence-to-accidental ratio of above 200. Tunable Bell state generation is also demonstrated by simply rotating the pump polarization, with a fidelity up to 0.93. Our results suggest rBN as an ideal candidate for on-chip integrated quantum devices.
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