Rotational Kirigami Tessellation Metasurface for Tunable Chirality

Abstract Kirigami, with a simple mechanical transformation fashion, offers versatile ways and unconventional approaches for realizing cutting‐edge tunable devices. Here, a rotational kirigami tessellation metasurface with tunable chirality using 2D‐to‐2D in‐plane transformation is designed and experimentally demonstrated. The rotational metasurface is built using flexible filament as a supporting dielectric and silver ink as conductive patterns on the top and bottom layers and operated via mechanical transformation. Unlike conventional works where the symmetric‐breaking feature is obtained from 2D to 3D transformation, the proposed structure is designed in such a way that it can break mirror‐symmetric by misaligning the conductive pattern via rotating sub‐elements of the structure led to achieving dual‐band bifunctional tunable chiral transmission responses. Finally, achiral and chiral transmission responses at different rotation angle states are experimentally confirmed. The proposed approach can be applied to various applications, opening new avenues to design 2D‐to‐2D in‐plane transformation mechanical‐based electromagnetic devices.