Metamaterial-based absorbers are a new kind of synthetic electromagnetic materials.Because of their small thickness,easy manufacture and stable performance,they are widely used in electromagnetic wave detection in different bands.Based on the principle of equivalent LC resonant circuit,a dual-band narrow-band absorber in terahertz band is designed in this paper.The frequency domain solver based on CST software is used to study the absorption characteristics of the absorber in terahertz band.The relationship between changing different system parameters and optimizing the absorption rate and adjusting the position of resonance absorption peak is analyzed in detail.It has certain guiding significance for the detection of terahertz wave and the fabrication and optimization of terahertz wave absorbers,filters and resonators.
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