A dual-sided elastic metasurface

By introducing pillars into the elastic metasurface and controlling their spacing, a double-sided elastic metasurface was designed, which solved the problem of difficult bidirectional incident bending wave control in the prior art, and achieved independent control effect over a wide frequency range, improving the flexibility of function and bandwidth.

CN120109524BActive Publication Date: 2026-06-23TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Filing Date
2025-04-17
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing elastic metasurfaces are difficult to effectively control bidirectional incident bending waves, and their function varies greatly with the incident frequency, resulting in a narrow operating bandwidth and limiting their applications.

Method used

A double-sided elastic metasurface is designed to achieve independent control of positive and negative incident bending waves by introducing pillars in the unit cell and controlling the pillar spacing. A double-sided elastic metasurface is constructed using specific phase shift and reflection coefficient design to meet the control requirements in a wide frequency range.

Benefits of technology

It enables independent asymmetric path control of positive and negative incident curved waves over a wide frequency range, including focusing and deflection functions, enhancing the flexibility and bandwidth of applications.

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Abstract

The application belongs to the technical field of elastic metasurface, and particularly relates to a double-sided elastic metasurface, which comprises a series of unit cells arranged along an interface direction, wherein the unit cells comprise strip units and columns, the sizes of the strip units in each unit cell are the same, two adjacent unit cells are separated by a groove, the sizes of the columns in each unit cell are the same, and each unit cell contains at least two columns. The application has simple structure, is easy to design, is convenient to process, can flexibly regulate the propagation of bending waves, and has application prospects in multifunctional elastic wave device design, structure health detection and the like. In addition, the application further discloses a design method of the double-sided elastic metasurface.
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