Quantum metasurface for multi-photon interference and state reconstruction
Abstract
Metasurfaces based on resonant nanophotonic structures have enabled novel types of flat-optics devices often outperforming the capabilities of bulk components, yet these advances remain largely unexplored for quantum applications. We show that non-classical multi-photon 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 multi-photon 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 ultra-thin quantum metadevices for the manipulation and measurement of multi-photon quantum states with applications in free-space quantum imaging and communications.
Keywords
Cite
@article{arxiv.1804.03494,
title = {Quantum metasurface for multi-photon interference and state reconstruction},
author = {Kai Wang and James G. Titchener and Sergey S. Kruk and Lei Xu and Hung-Pin Chung and Matthew Parry and Ivan I. Kravchenko and Yen-Hung Chen and Alexander S. Solntsev and Yuri S. Kivshar and Dragomir N. Neshev and Andrey A. Sukhorukov},
journal= {arXiv preprint arXiv:1804.03494},
year = {2018}
}
Comments
19 pages, 14 figures