Metalens-array-based high-dimensional and multiphoton quantum source

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

Research output: Contribution to journalArticlepeer-review

386 Scopus citations

Abstract

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- A nd 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.

Original languageEnglish
Pages (from-to)1487-1490
Number of pages4
JournalScience
Volume368
Issue number6498
DOIs
StatePublished - 26 Jun 2020

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