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Updated: Aug 7, 2026
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Anisotropic variable negative-Poisson-ratio metamaterials for tunable multispectral camouflage and electromagnetic
Xiaofen Yang1, Kaixia Yang1, Meiwan Ying1
1Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Coatings for Advanced Equipment, College of Smart Materials and Future Energy, Fudan University, Shanghai 200438, China.
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Adaptive electromagnetic compatibility, camouflage, and energy conversion raises challenge in the swiftly responsive modulation. Herein, we designed pixelated negative-Poisson-ratio metamaterials that enable fast control over structural anisotropy and thus electromagnetic properties. One-dimensional conductors are highly oriented in each pixel through sequential shear, stretch, and alignment processes. The uniaxial anisotropy leads to the highest conductive ratio of 2.8 × 106 among different directions. This enables the angle-dependent electromagnetic compatibility across transparency-absorption-shielding regions. The meta-framework realizes strain-reliant anisotropic tunability. The deformation continuously adjusts electromagnetic wave absorbance from 0.2 to 0.9 (reflection loss from -0.8 to -17 decibels). Through chess-like assembly, the framework can also maintain deformation-insensitive absorbance beyond 0.9. The proof-of-concept devices harvest environmental electromagnetic energy to electricity. The generator outputs more than 0.5 volts and the cell generate a peak power of 0.75 milliwatt. Besides, the devices demonstrate tunable camouflage in microwave, infrared, and visible spectra.
