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Materials 2018, 11(9), 1619; https://doi.org/10.3390/ma11091619

Polarization-Controlled and Flexible Single-/Penta-Band Metamaterial Absorber

School of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China
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Received: 12 August 2018 / Revised: 28 August 2018 / Accepted: 30 August 2018 / Published: 5 September 2018
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Abstract

In this paper, a polarization-controlled and flexible metamaterial absorber made of a set of wires etched on ultrathin teflon dielectric substrate is proposed. The simulation results showed that the proposed absorber achieved single-band absorptivity of 99.8% at 6.64 GHz for the TM (transverse magnetic) polarization wave and penta-band absorptivity of more than 99% at 11.68 GHz, 13.58 GHz, 15.48 GHz, 17.38 GHz, and 19.28 GHz for the TE (transverse electric) polarization waves. Moreover, each absorption peak had very narrow relative bandwidth and the position of penta-band absorption peaks could be adjusted by changing the length of the corresponding wire or selecting suitable substrate material according to actual requirements, because each wire can independently respond to electromagnetic (EM) waves. Furthermore, the surface current distributions corresponding to each absorption peak were studied to demonstrate the absorption mechanism. The absorption properties of the proposed structure with different bending radii and under different incident angles of the EM waves were investigated, showing good flexibility and incident angle-insensitive properties. In addition, the simulation results were confirmed by measuring a fabricated prototype. The proposed absorber may have useful applications in polarizers, sensors, bolometers, polarization detectors, etc. View Full-Text
Keywords: metamaterial absorber; polarization-controlled; penta-band; flexibility metamaterial absorber; polarization-controlled; penta-band; flexibility
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Wang, J.; Yang, R.; Xu, J.; Tian, J.; Ma, R.; Zhang, W. Polarization-Controlled and Flexible Single-/Penta-Band Metamaterial Absorber. Materials 2018, 11, 1619.

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