Metasurfaces and nanoantennas are a powerful class of nanostructured materials enabling unprecedented control of light–matter interaction. By overcoming limitations of traditional optics, they have become key platforms for advancing nonlinear and quantum photonics. These structures support applications ranging from secure communications and sensing to imaging and quantum information processing. Recent breakthroughs include high-harmonic generation, ultrafast all-optical switching, and quantum light generation enhanced by resonances.
This Special Topic aims to gather the latest breakthroughs and forward-looking research on metasurfaces and nanoantennas aiming for their applications in nonlinear optics and quantum photonics. Contributions that explore novel concepts, new experimental demonstrations, fresh theoretical insights, and emerging applications are highly encouraged and very much welcomed.
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