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Metalens-array–based high-dimensional and multiphoton quantum source
Science ( IF 41.845 ) Pub Date : 2020-06-26 , DOI: 10.1126/science.aba9779
Lin Li, Zexuan Liu, Xifeng Ren, Shuming Wang, Vin-Cent Su, Mu-Ku Chen, Cheng Hung Chu, Hsin Yu Kuo, Biheng Liu, Wenbo Zang, Guangcan Guo, Lijian Zhang, Zhenlin Wang, Shining Zhu, Din Ping Tsai

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 × 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 is observed 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.
更新日期:2020-06-26

 

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