Metasurface interferometry towards quantum sensors
Abstract
Optical metasurfaces open new avenues for precise wavefront control of light for integrated quantum technology. Here, we demonstrate a hybrid integrated quantum photonic system that is capable to entangle and disentangle two-photon spin states at a dielectric metasurface. By interfering single-photon pairs at a nanostructured dielectric metasurface, a path-entangled two-photon NOON state with circular polarization is generated that exhibits a quantum HOM interference visibility of 86 4%. Furthermore, we demonstrate nonclassicality and phase sensitivity in a metasurface-based interferometer with a fringe visibility of 86.8 1.1 % in the coincidence counts. This high visibility proves the metasurface-induced path entanglement inside the interferometer. Our findings provide a promising way to hybrid-integrated quantum technology with high-dimensional functionalities in various applications like imaging, sensing, and computing.
Keywords
Cite
@article{arxiv.1908.04988,
title = {Metasurface interferometry towards quantum sensors},
author = {Philip Georgi and Marcello Massaro and Kai-Hong Luo and Basudeb Sain and Nicola Montaut and Harald Herrmann and Thomas Weiss and Guixin Li and Christine Silberhorn and Thomas Zentgraf},
journal= {arXiv preprint arXiv:1908.04988},
year = {2019}
}