期刊
SCIENCE
卷 368, 期 6498, 页码 1487-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aba9779
关键词
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资金
- National Program on Key Basic Research Project of China [2017YFA0303700, 2016YFA0301700, 2018YFA030602, 2019YFA0308704]
- National Natural Science Foundation of China [116210911, 1822406, 11834007, 117741646, 1590932, 11774333, 11690032, 91836303, 61490711]
- Anhui Initiative in Quantum Information Technologies [AHY130300]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB24030601]
- Shenzhen Science and Technology Innovation Commission [SGDX2019081623281169]
The development of two-dimensional metasurfaces has shown great potential in quantum-optical technologies because of the excellent flexibility in light-field manipulation. By integrating a metalens array with a nonlinear crystal, we demonstrate a 100-path spontaneous parametric down-conversion photon-pair source in a 10 x 10 array, which shows promise for high-dimensional entanglement and multiphoton-state generation. We demonstrate two-, three- and four-dimensional two-photon path entanglement with different phases encoded by metalenses with fidelities of 98.4, 96.6, and 95.0%, respectively. Furthermore, four-photon and six-photon generation isobserved with high indistinguishability of photons generated from different metalenses. Our metalens-array-based quantum photon source is compact, stable, and controllable, indicating a new platform for integrated quantum devices.
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