Ultrathin terahertz dual-band perfect metamaterial absorber using asymmetric double-split rings resonator

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Abstract

In this article, an ultrathin terahertz dual band metamaterial absorber made up of patterned asymmetrical double-split rings and a continuous metal layer separated by a thin FR-4 layer is designed. Simulation results show that two almost identical strong absorption peaks appear in the terahertz band. When the incident electric field is perpendicular to the ring gaps located at 11 μm asymmetrically, the absorptivity of 98.6% at 4.48 THz and 98.5% at 4.76 THz can be obtained. The absorption frequency and the absorptivity of the absorber can be modulated by the asymmetric distribution of the gaps. The perfect metamaterial absorber is expected to provide important reference for the design of terahertz modulator, filters, absorbers, and polarizers.

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APA

Lu, T., Zhang, D., Qiu, P., Lian, J., Jing, M., Yu, B., & Wen, J. (2018). Ultrathin terahertz dual-band perfect metamaterial absorber using asymmetric double-split rings resonator. Symmetry, 10(7). https://doi.org/10.3390/sym10070293

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