Journal
SCIENCE
Volume 361, Issue 6407, Pages 1104-1107Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aat8196
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Funding
- Australian Research Council [DP160100619, DP150103733, DE180100070]
- Ministry of Science and Technology (MOST), Taiwan [106-2221-E-008-068-MY3]
- Australian Research Council [DE180100070] Funding Source: Australian Research Council
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Metasurfaces based on resonant nanophotonic structures have enabled innovative types of flat-optics devices that often outperform the capabilities of bulk components, yet these advances remain largely unexplored for quantum applications. We show that nonclassical multiphoton interferences can be achieved at the subwavelength scale in all-dielectric metasurfaces. We simultaneously image multiple projections of quantum states with a single metasurface, enabling a robust reconstruction of amplitude, phase, coherence, and entanglement of multiphoton polarization-encoded states. One-and two-photon states are reconstructed through nonlocal photon correlation measurements with polarization-insensitive click detectors positioned after the metasurface, and the scalability to higher photon numbers is established theoretically. Our work illustrates the feasibility of ultrathin quantum metadevices for the manipulation and measurement of multiphoton quantum states, with applications in free-space quantum imaging and communications.
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