期刊
PHYSICAL REVIEW APPLIED
卷 15, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.15.064059
关键词
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资金
- National Key R&D Program of China [2019YFA0705000, 2017YFA0303700]
- Key R&D Program of Guangdong Province [2018B030329001]
- LeadingEdge Technology Program of Jiangsu Natural Science Foundation [BK20192001]
- National Natural Science Foundation of China [51890861, 11690031, 11621091, 11627810, 11674169, 91950206, 11974178]
- Fundamental Research Funds for the Central Universities [021314380177]
The research has achieved a high-flux entangled-photon source on a lithium niobate on isolator chip, with significant improvements in photon-pair rate and spectral brightness. By multiplexing energy-time entanglement for eight channels, the data rate and visibility have been further enhanced, making it suitable for information processing on a chip.
A high-flux entangled-photon source is a key resource for quantum optical study and application. Here, it is realized in a lithium niobate on isolator (LNOI) chip, with 2.79 x 10(11) Hz/mW photon-pair rate and 1.53 x 10(9) Hz/(nm mW) spectral brightness. These data are boosted by over 2 orders of magnitude compared with existing technologies. A 160-nm-broad bandwidth is engineered for eight-channel multiplexed energy-time entanglement. Harnessed by high-extinction-frequency correlation and Franson interferences up to 99.17% visibility, such energy-time-entanglement multiplexing further enhances the high-flux data rate and warrants broad application in-information processing on a chip.
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