Elastic Metasurface with Dual-Coupled Resonators for Highly Efficient Energy Harvesting
Tian Yang, Zibin Lin, Xuefeng Zhu, Tianzhi Yang
Abstract
Highly efficient elastic wave manipulation is crucial in the materials and physical engineering communities. Recently, coupling-interaction theory has attracted extensive attention to enhance the efficiency of traditional metamaterials. Here, experimental demonstrations of an elastic focusing metasurface with a dual-coupled resonator for high-efficient energy harvesting are exhibited. An easy-to-implement optimized elastic metasurface with bridged coupling, which is higher efficiency than traditional elastic metasurfaces, is proposed. Results show that a significantly enhanced efficiency, up to 239% is achieved, compared with a conventional metasurface. Furthermore, the robustness of the enhanced efficiency against variation of the focal point and frequency fluctuations of the incident waves is observed. The suggested device provides a simple feasible method for high-efficient energy harvesting.