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Mesh-based metasurfaces with high optical transparency.
Optics Express
|December 19, 2025
Summary
This study introduces a novel metasurface technology using fine-line meshes for high optical transparency and efficient electromagnetic absorption. The developed transparent microwave absorber demonstrates polarization insensitivity and wide-angle characteristics.
Area of Science:
- Metamaterials and Nanophotonics
- Electromagnetic Wave Manipulation
Background:
- Traditional resonant patterns in metasurfaces often compromise optical transparency.
- Achieving efficient electromagnetic absorption alongside high optical transmittance is a significant challenge.
Purpose of the Study:
- To propose and demonstrate a novel metasurface technology for optically transparent electromagnetic absorbers.
- To design a microwave absorber with polarization insensitivity and wide-angle incidence using fine-line mesh metasurfaces.
Main Methods:
- A metasurface design utilizing a fine-line-based mesh resonant structure was developed.
- An optically transparent microwave absorber was fabricated using nano-imprinting technology, comprising stacked mesh metasurface films.
- The absorption rate was tuned by adjusting the stacking gap (transparent layer thickness).
Main Results:
- The fabricated metasurface films achieved high average optical transmittances of 91.53% and 92.67%.
- The developed absorber exhibited polarization insensitivity and wide-angle incidence characteristics.
- Tunable electromagnetic absorption rates ranging from 94.15% to 18.4% were achieved by adjusting the transparent layer thickness.
Conclusions:
- The proposed fine-line mesh metasurface technology enables simultaneous high optical transparency and efficient electromagnetic absorption.
- Embedding these metasurface films into transparent materials offers a viable solution for applications requiring both functionalities, such as transparent windows.
