Tunable origami metastructure based on liquid crystal for curvature sensing

In this paper, a liquid crystal (LC) tunable origami metastructure (OMS) designed for curvature sensing on cylindrical surfaces to measure their curvature is introduced. The LC employed is K15 (5CB) and the applicable band is 0.36 similar to 23 GHz. When excited by electromagnetic waves (EMWs) within the 4 similar to 16 GHz, the resonance frequency of the OMS shifts from 10.24 GHz to 10.144 GHz, corresponding to a change in absorption amplitude ranging from 0.773 to 0.920. In terms of curvature sensing, the detectable range of curvature spans from 0 to 0.327 mm-1. The maximum sensitivity (S) achieved for curvature measurement reaches 0.918/mm-1, accompanied by a quality factor (Q -factor) of 25.88. The proposed OMS embodies numerous excellent traits, including wide -range sensing capabilities and heightened S, promising for applications in bionic skin, smart robotics, and related fields. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement