Scientific Achievement
Sketch of a metasurface being used to image an input N-photon polarization state into an M-spot image. At the top right is a scanning electron microscopy image of the fabricated all-dielectric metasurface. Green crosses represent photons; purple blocks on the metasurface represent nanoresonators (hi-res image)
Mixed quantum polarization states were simultaneously determined by multi-photon interference on metasurfaces and single photon detection.
Significance and Impact
The single- and multiphoton state measurements with subwavelength thin nanostructures and nonlocal correlation provides a way for ultimate miniaturization suitable for free-space quantum imaging and communications.
Research Details
– Imaging-based measurements of a photon’s quantum state.
– Single-photon-sensitive CCD camera is used for multiple-time-frame images of quantum states.
– Standard semiconductor fabrication technology to manufacture metasurfaces.
K. Wang, J. G. Titchener, S. S. Kruk, L. Xu, H.-P. Chung, M. Parry, I. I. Kravchenko, Y.-H. Chen, A. S. Solntsev, Y. S. Kivshar, D. N. Neshev, and A. A. Sukhorukov, “Quantum metasurface for multiphoton interference and state reconstruction,” Science 361 (6407), 1104-1108 (2018). DOI: 10.1126/science.aat8196
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