Quantum metasurface for multiphoton interference and state reconstruction

Date

2018

Authors

Wang, Kai
Titchener, James
Kruk, Sergey
Xu, Lei
Chung, Hungpin
Parry, Matthew
Kravchenko, Ivan I
Chen, Yenhung
Solntsev, Alexander
Kivshar, Yuri

Journal Title

Journal ISSN

Volume Title

Publisher

American Association for the Advancement of Science

Abstract

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.

Description

Keywords

Citation

Source

Science

Type

Journal article

Book Title

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Access Statement

License Rights

DOI

10.1126/science.aat8196

Restricted until

2037-12-31