Nature Inspired Deterministic Aperiodic Metasurface for EM-Wave Focusing, Diffusion, and OAM Generation at Microwave Regime (Invited Paper)

Abstract

Understanding the role of distributions of periodic and disordered meta-atoms in a host dielectric substrate is technologically important for designing novel engineered surfaces with novel radiation or scattering properties. In this invited paper, a new class of nature inspired deterministic aperiodic metasurfaces will be presented for EM-wave shaping. First, this talk will review the recent progress of conventional periodic metasurfaces and their advantages, as well as discuss recent breakthroughs, especially those focusing on novel features of the periodic metasurface. After that, our research progress on the nature inspired deterministic aperiodic metasurfaces will be introduced to the audience. Special emphasis will be placed on three important applications: EM-wave diffusion and radar cross section reduction, generation of high purity OAM vortex beams, and high gain wide-angle beam scanning reflectarrays. It will be shown that such class of nature inspired deterministic aperiodic metasurfaces, can reduce the design complexities associated with the conventional metasurfaces and an improved scattering/ radiation characteristics compared with the corresponding metasurface of periodic distribution. The talk will conclude with a discussion of open problems and future challenges associated with the nature inspired metasurface.