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

Materials

Jianping Xu¹  Jiayun Wang¹  Rongcao Yang¹  Wenmei Zhang¹  Jinping Tian¹  Runbo Ma¹ 

[1] School of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China;

关键词: metamaterial absorber;    polarization-controlled;    penta-band;    flexibility;   

DOI  :  10.3390/ma11091619

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown