| YAO Li-fang,LI Min-hua,ZHAI Xiao-min,WANG Hui-bo,DONG Jian-feng.Multi-band polarization insensitive metamaterial absorber with dual cross-wires structure[J].Optoelectronics Letters,2015,11(6):414-417 |
| Multi-band polarization insensitive metamaterial absorber with dual cross-wires structure |
| Author Name | Affiliation | | YAO Li-fang | College of Information Science and Engineering, Ningbo University, Ningbo 315211, China | | LI Min-hua | College of Information Science and Engineering, Ningbo University, Ningbo 315211, China | | ZHAI Xiao-min | College of Information Science and Engineering, Ningbo University, Ningbo 315211, China | | WANG Hui-bo | College of Information Science and Engineering, Ningbo University, Ningbo 315211, China | | DONG Jian-feng | College of Information Science and Engineering, Ningbo University, Ningbo 315211, China |
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| Abstract: |
| A five-band metamaterial absorber (MMA) based on a simple planar structure is proposed. It utilizes different areas of a single unit cell to match impedance, and produces different absorptive frequencies. Numerical calculation shows that the MMA has five different absorption peaks at 3.78 GHz, 7.66 GHz, 10.9 GHz, 14.5 GHz and 16.7 GHz, and their absorption rates reach 95.5%, 98.6%, 95.7%, 96.6% and 99.8%, respectively. The proposed structure is polarization insensitive for transverse electric (TE) and transverse magnetic (TM) incident waves. Also, the absorptive characteristics over large incident angles are examined. In addition, we analyze the absorption mechanism by the surface current density and power flow density distributions. This simple structure provides a way to design multi-band MMA, and also saves the cost of fabrication. |
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| This work has been supported by the National Natural Science Foundation of China (No.61475079), the Ningbo Optoelectronic Materials and |
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