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Broadband efficient anomalous reflection using an aggressively discretized metasurface
Optics Express
|April 27, 2022
Summary
Aggressively discretized metasurfaces with few unit cells achieve efficient anomalous reflection. This research demonstrates a metasurface with unprecedented 53.6% bandwidth and over 80% power efficiency.
Area of Science:
- Electromagnetics and Optics
- Materials Science
Background:
- Metasurfaces offer precise control over electromagnetic waves.
- Aggressive discretization simplifies metasurface design and enhances performance.
Purpose of the Study:
- To investigate the power efficiency and bandwidth of aggressively discretized metasurfaces for anomalous reflection.
- To design and demonstrate a metasurface with high efficiency and broad bandwidth.
Main Methods:
- Spectral domain analysis to determine theoretical bandwidth limits.
- Design of a metasurface using two unit cells per period.
- Fabrication and experimental validation of the designed metasurface.
Main Results:
- Theoretical upper limit for bandwidth identified as 67%.
- Designed metasurface achieved over 80% power efficiency into anomalous reflection.
- Demonstrated an unprecedented operational bandwidth of 53.6%.
Conclusions:
- Aggressive discretization enables simple metasurface designs with broadband anomalous reflection.
- The designed metasurface surpasses previous bandwidth limitations.
- Experimental results validate the simulated performance, confirming the design's efficacy.
