Quantum metasurface for multiphoton interference and state reconstruction

Kai Wang, James G. Titchener, Sergey S. Kruk, Lei Xu, Hung Pin Chung, Matthew Parry, Ivan I. Kravchenko, Yen Hung Chen, Alexander S. Solntsev, Yuri S. Kivshar, Dragomir N. Neshev, Andrey A. Sukhorukov

Research output: Contribution to journalArticlepeer-review

249 Scopus citations


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 polarizationinsensitive 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.

Original languageEnglish
Pages (from-to)1104-1108
Number of pages5
Issue number6407
StatePublished - 14 Sep 2018


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