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Trifunctional metasurface based on spoof surface plasmon polaritons.
Optics Express
|July 19, 2020
Summary
This study introduces a novel metasurface capable of performing transmission, anomalous refraction, and absorption across different frequency bands. This multifunctional metasurface, based on spoof surface plasmon polaritons, shows promise for advanced microwave devices.
Area of Science:
- Electromagnetics and Metamaterials
- Applied Physics
Background:
- Metasurfaces offer tunable electromagnetic responses.
- Integrating multiple functionalities into a single metasurface is a key challenge.
Purpose of the Study:
- To design and demonstrate a single metasurface with three distinct functions: transmission, anomalous refraction, and absorption.
- To leverage spatial k-dispersion engineering of spoof surface plasmon polaritons (SSPPs) for multifunctional integration.
Main Methods:
- Design of two unit cells based on SSPPs k-dispersion engineering.
- Chessboard arrangement of unit cells to achieve integrated functionalities.
- Electromagnetic simulation and experimental fabrication/measurement of the metasurface prototype.
Main Results:
- Achieved high transmission in the 2.0-9.0 GHz band.
- Demonstrated anomalous refraction in the 10-11.7 GHz band via forward scattering cancellation.
- Obtained strong absorption in the 12.6-20.0 GHz band.
- Experimental results validated simulation predictions.
Conclusions:
- The proposed metasurface successfully integrates transmission, anomalous refraction, and absorption functionalities.
- The design demonstrates the potential for multifunctional microwave devices, including shared-aperture antennas.
