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Flexible and transparent broadband microwave metasurface absorber based on multipolar interference engineering.
Optics Express
|March 18, 2022
Summary
This study presents a novel, optically transparent microwave metasurface absorber. It achieves high absorption across a broad frequency range by engineering multipolar interference for advanced electromagnetic applications.
Area of Science:
- Metamaterials and Nanophotonics
- Electromagnetics and Microwave Engineering
Background:
- Metasurfaces offer tunable electromagnetic responses through engineered subwavelength structures.
- Controlling electromagnetic interactions via multipoles is crucial for advanced device functionalities.
Purpose of the Study:
- To design and demonstrate an optically transparent, flexible, and broadband microwave metasurface absorber.
- To leverage multipolar interference for enhanced absorption and back-scattering suppression.
Main Methods:
- Design of a metasurface incorporating electric dipole and electric quadrupole modes.
- Application of generalized Kerker effect principles for interference engineering.
- Experimental fabrication and characterization of the metasurface absorber.
Main Results:
- Achieved high average absorption of 89% across the 4-18 GHz microwave band.
- Demonstrated simultaneous broadband absorption and good optical transparency.
- Validated the effectiveness of multipolar interference for back-scattering suppression.
Conclusions:
- The developed metasurface provides an effective approach for broadband microwave absorption.
- The design is suitable for applications requiring both absorption and optical transparency.
- Potential applications include electromagnetic shielding, radar stealth, and energy harvesting.
