Graphene based THz metasurface resonator with back-reflecting repeating subunit optimizes absorption efficiency

https://phys.org/news/2024-01-carbon-based-tunable-metasurface-absorber.html

"optimized geometry, material properties, polarization sensitivity, and tuning mechanisms... patterned conductive top layer contains concentric graphite rings interconnected by graphene wires, simple dielectric middle layer dissipates electromagnetic waves, bottom absorption layer prevents waves transmitting through device maximizing absorption efficiency... 1 eV Fermi level enables 8.99 THz delivering >90% absorption... insensitivity to incident radiation polarization angle... biomedical imaging, telecommunications, sensors"

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https://phys.org/news/2024-04-liquid-crystal-based-tunable-dielectric.html

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https://techxplore.com/news/2024-04-coupled-resonator-high-frequency.html