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Fig. 1
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(a) Conventional optical path for photon pair generation using resonant metasurface. HWP = Half Wave Plate, CW = Continuous Wave, LP filter = Long Pass filter, SNSPD = Superconducting Nanowire Single-Photon Detector. (b) Conceptual illustration of a flatband resonant metasurface versus a dispersive resonant metasurface.
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