Highly Tunable Cascaded Metasurfaces for Continuous Two-Dimensional Beam Steering.

ABSTRACT: Cascaded metasurfaces can exhibit powerful dynamic light manipulation by mechanically tuning the far-field interactions in the layers. However, in most current designs, the metasurfaces are separated by gaps smaller than a wavelength to form a total phase profile, representing the direct accumulation of the phase profiles of each layer. Such small gap sizes may not only conflict with the far-field conditions but also pose great difficulties for practical implementations. To overcome this limitation, a design paradigm taking advantage of a ray-tracing scheme that allows the cascaded metasurfaces to operate optimally at easily achievable gap sizes is proposed. Enabled by the relative lateral translation of two cascaded metasurfaces, a continuous two-dimensional (2D) beam-steering device for

SUBMITTER: Zhang L 

PROVIDER: S-EPMC10460883 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature