Intensity-asymmetric wavefront shaping in nonlocal meta-lens.

ABSTRACT: Asymmetric wavefront shaping can unlock essential functionalities for next-generation photonic systems, such as unidirectional transmission, nonlinear signal routing, and nonreciprocal light control. However, achieving these functionalities in passive nonlinear metasurfaces remains challenging due to the required trade-offs among nonlinear efficiency, phase modulation, and directional asymmetry, particularly on low-index substrates with weak intrinsic asymmetry. Here, we propose a meta-lens that effectively integrates local Mie-type resonances with nonlocal quasi-bound states in the continuum, tailoring their interaction. Without any additional layers, this hybrid design produces a strong directional response originating from asymmetries induced by the silica substrate, while preserving hi

SUBMITTER: Yao J 

PROVIDER: S-EPMC12946171 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature