Li Zhiqiang, Liu Kaiming, Li Chunlin, Liu Yongquan, Du Yanping, Li Ting, Sun Zhaoyong, Zhao Liuxian, Yang Jun
Beijing Institute of Graphic Communication, 1 Xinghua Avenue (Band 2), Beijing, 102600, China.
State Key Laboratory for Strength and Vibration of Mechanical Structures, Department of Engineering Mechanics, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Sci Rep. 2024 Sep 29;14(1):22573. doi: 10.1038/s41598-024-73189-y.
In this paper, a flexural Mikaelian lens in thin plate is designed by using conformation transformation. The propagation characteristics of flexural waves in the lens are investigated through rays trajectory equation, simulation analyses, and experimental tests, confirming the self-focusing properties of the Mikaelian lens. Additionally, the study explores the Talbot effect for flexural waves, revealing through simulation studies that the Talbot effect within the Mikaelian lens exhibits nearly diffraction-free properties. Building on the non-diffractive nature of the Talbot effect within the Mikaelian lens, we explore the potential for encoding flexural waves using active interference sources. The simulation and experiment results demonstrate the good performance of the designed active encoding system. This work opens up new avenues for the encoding of flexural waves, presenting promising implications for applications in communication such as structural health monitoring, wireless communication in solid media and data transmission in robotics and other areas related to flexural wave technology.
本文利用保角变换设计了一种薄板中的弯曲米卡埃利安透镜。通过光线轨迹方程、模拟分析和实验测试研究了透镜中弯曲波的传播特性，证实了米卡埃利安透镜的自聚焦特性。此外，该研究还探讨了弯曲波的塔尔博特效应，通过模拟研究发现米卡埃利安透镜内的塔尔博特效应具有近无衍射特性。基于米卡埃利安透镜内塔尔博特效应的非衍射性质，我们探索了使用有源干涉源对弯曲波进行编码的潜力。模拟和实验结果证明了所设计的有源编码系统的良好性能。这项工作为弯曲波编码开辟了新途径，对诸如结构健康监测、固体介质中的无线通信以及机器人技术中的数据传输等与弯曲波技术相关的通信应用具有广阔的应用前景。
