Ultra narrowband geometric-phase resonant metasurfaces.

ABSTRACT: The concept of a geometric phase has sparked a revolution in photonics. Conventional space-variant polarization manipulation in optical systems only results in broadband geometric phases. Recently emerged nonlocal metasurfaces show an ability to compress the operating bandwidth through modulations of wavelength-dependent amplitudes. However, their geometric phases are still broadband and not linear, posing severe challenges to realize ultra narrowband metadevices. Here, we propose and demonstrate the generation of ultra narrowband and spatially variable geometric phases in resonant metasurfaces. We find that an array of perturbed Mie resonators is able to simultaneously preserve its global symmetry and local transformation. Local transformation provides a pixel-level geometric phase, where

SUBMITTER: Ouyang X 

PROVIDER: S-EPMC12012505 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature