Journal
LIGHT-SCIENCE & APPLICATIONS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41377-019-0182-6
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Funding
- European Research Council (ERC) under the European Union [724306]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the Collaborated Research Center TRR 142 [231447078]
- National Natural Science Foundation of China [11774145]
- Applied Science and Technology Project of Guangdong Science and Technology Department [2017B090918001]
- European Research Council (ERC) [724306] Funding Source: European Research Council (ERC)
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Optical metasurfaces open new avenues for the precise wavefront control of light for integrated quantum technology. Here, we demonstrate a hybrid integrated quantum photonic system that is capable of entangling and disentangling two-photon spin states at a dielectric metasurface. Via the interference of single-photon pairs at a nanostructured dielectric metasurface, a path-entangled two-photon NOON state with circular polarization that exhibits a quantum HOM interference visibility of 86 +/- 4% is generated. Furthermore, we demonstrate nonclassicality andphase sensitivity in a metasurface-based interferometer with a fringe visibility of 86.8 +/- 1.1% in the coincidence counts. This high visibility proves the metasurface-induced path entanglement inside the interferometer. Our findings provide a promising way to develop hybrid-integrated quantum technology operating in the high-dimensional mode space in various applications, such as imaging, sensing, and computing.
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