Related Experiment Video
Updated: May 3, 2026
Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
Published on: June 28, 2024
A versatile smart transformation optics device with auxetic elasto-electromagnetic metamaterials
Dongheok Shin1, Yaroslav Urzhumov2, Donghwan Lim1
1School of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
Smart metamaterials integrate electromagnetic and mechanical properties for flexible devices. Researchers demonstrate smart transformation optics (STO) using auxetic metamaterials, enabling shape-changing cloaks and waveguides at microwave frequencies.
Area of Science:
- Metamaterials Science
- Electromagnetism
- Mechanical Engineering
Background:
- Smart metamaterials combine electromagnetic and mechanical properties for advanced applications.
- Smart transformation optics (STO) enables control over wave propagation and device deformation.
- Auxetic metamaterials with a Poisson ratio of -1 offer exceptional flexibility.
Purpose of the Study:
- To demonstrate STO devices using extremely auxetic elasto-electromagnetic metamaterials.
- To show efficient operation of these devices under significant deformation.
- To provide analytical derivations for designing STO devices.
Main Methods:
- Fabrication of devices from a single sheet of uniform square-lattice metamaterial.
- Utilizing mechanical deformation to achieve desired effective permittivity.
- Integrating transformation optics and continuum mechanics for design.
- Analyzing microwave electric fields to confirm device functionality.
Main Results:
- Demonstrated STO devices including carpet cloaks and bent waveguides operating at 7-8 GHz.
- Confirmed efficient device operation across a wide range of deformations.
- Provided analytical derivations for STO device design.
- Clarified the impact of plane stress and plane strain assumptions on auxetic metamaterials.
Conclusions:
- Elasto-electromagnetic metamaterials with STO enable highly flexible, shape-conformable devices.
- Mechanical deformation is a viable method to tune electromagnetic properties for STO applications.
- The study provides a theoretical and experimental framework for designing advanced smart metamaterials.
More Related Videos
08:48Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
Published on: September 25, 2020
11:09Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
Published on: June 23, 2017