Hyperuniform disordered distribution metasurface for scattering reduction

Metasurfaces with spatially varying reflection phases have promised great possibilities in realizing diffusion-like backward scattering. However, most studies in the field of metasurface reflectors focus on the diffusion generated by a phase gradient from unit cells in periodic grids. In this paper, we propose a general idea of integrating the concept of a hyperuniform disordered structure to realize a metasurface, where the effect of the spatial distribution is taken into account to realize more diffusion. A V-shaped structure is utilized as the unit cell for the metasurface to realize two kinds of elements with a phase difference of 180 degrees. The metasurface is generated by distributing the unit cells according to a hyperuniform disordered distribution, and we compared its performance with a metasurface comprised of the same unit cells, distributed on a fixed periodic lattice. Both simulation and experimental results demonstrate that the metasurface with the hyperuniform disorder performs better than the periodic metasurface by enlarging the operating bandwidth with a significant reduction in the radar cross section of the surface. When the frequency operating frequency increases, only one reflected beam is observed for the metasurfaces based on hyperuniform disordered distribution, which is in contrast to the periodic metasurface where several multiple reflected beams are observed.

Automated summary

The study introduces the concept of using hyperuniform disorder to generate metasurfaces for improved diffusion. The metasurface with hyperuniform disorder outperforms the periodic metasurface by expanding the operating bandwidth and significantly reducing the radar cross section.