Fig. 1: Two-photon interference of biphotons in [110]-GaAs metasurfaces.
![Fig. 1: Two-photon interference of biphotons in [110]-GaAs metasurfaces.](http://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41377-025-01998-5/MediaObjects/41377_2025_1998_Fig1_HTML.png?as=webp)
a Schematic diagram of two-photon interference of biphotons emitted by spatially overlapping yet distinct resonances in [110]-GaAs metasurfaces. b Scanning electron microscopy (SEM) image of the metasurface at an intermediate phase of nanofabrication
