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A programmable metasurface with dynamic polarization, scattering and focusing control.
Huanhuan Yang1,2, Xiangyu Cao1, Fan Yang2
1Information and Navigation Institute, Air Force Engineering University, Xi'an, 710077, China.
Scientific Reports
|October 25, 2016
Summary
This study demonstrates a programmable metasurface capable of multiple electromagnetic functions. Real-time switching between anomalous reflection, diffusion, beam steering, and beam forming is achieved using PIN diodes and optimization algorithms.
Area of Science:
- Electromagnetics
- Materials Science
- Electrical Engineering
Background:
- Metasurfaces offer versatile control over electromagnetic waves.
- Programmable metasurfaces enable dynamic reconfigurability of EM responses.
Purpose of the Study:
- To investigate diverse electromagnetic responses of a large-scale programmable metasurface.
- To demonstrate multiple functionalities on a single metasurface platform.
Main Methods:
- Unit cells integrated with PIN diodes for binary coded phase control.
- Genetic algorithm and inverse fast Fourier transform (IFFT) for optimizing coding matrices.
- Field-programmable gate array (FPGA) for real-time function switching.
Main Results:
- Reconfigurable polarization conversion demonstrated.
- Dynamic scattering performance analyzed for plane and point sources.
- Anomalous reflection, diffusion, beam steering, and beam forming successfully realized and validated through simulations and experiments.
Conclusions:
- The proposed programmable metasurface achieves diverse EM functionalities with real-time switching.
- This technology holds significant potential for future electromagnetic applications.
