Multifunctional light field modulations of composite- phase-based diatomic metasurfaces

• Published in: Photonics and nanostructures 2025-01, p.101353, Article 101353
• Main Authors: Ge, Yuhan, Liu, Zexu, Song, Xueyao, Wang, Jicheng
• Format: Article
• Language: English
• Subjects: encryption; multimodal analysis; polarization imaging; wavefront control
• ISSN: 1569-4410
• DOI: 10.1016/j.photonics.2025.101353

The all-dielectric phase metasurface due to their low-loss characteristics can be used for efficient wavefront control in the optical visible range. In this paper, we construct and design an improved diatomic structure metasurface by using the joint regulation of geometric phase and propagation phase. Compared with single atomic structures, we introduce new degrees of freedom to flexibly and effectively control the phase and amplitude of the optical wavefront. We can joint geometric phase or propagation phase to arrange two kinds of supramolecular structures to sophisticatedly realize multifunctional modulations of on/off imaging distributions in the near field and different image displays in the far field. We believe that our research results can provide reference for multifunctional optical surfaces, dynamic optical control and optical information encryption. •We elaborately construct an improved diatomic structure metasurface by using the joint regulation of geometric phase and propagation phase.•Only two meta-atomic structures are used to design supramolecular units, which increases the near-field resolution.•Multi-channel imaging with polarization multiplexing in near and far fields can be realized.•Our design can provide reference for multifunctional optical surfaces, dynamic optical control and optical information encryption.