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设计,数值模拟和讨论了一种具有两个宽带和扁平的吸收带的超材料吸收器,其中一个是腔共振吸收带,另一个是电共振吸收带.电共振的吸收带由于空腔尺寸(d)或者介质层厚度(H)的增加而蓝移,而腔共振吸收带则表现出红移的现象.同时,电共振和腔共振吸收带可以通过优化吸收器的结构设计耦合为一个吸收带.最后,数值模拟研究了入射角度的改变对电共振和腔共振吸收带的影响.利用不同波段的共振模式形成不同吸收带的方式提供了将双吸收带调制为单吸收带的可能性.
A meta-material absorber with two broadband and flat absorption bands, one of which is the cavity resonance absorption band and the other of which is the electrical resonance absorption band, is designed, numerically simulated, and discussed. Due to the size of the cavity d) or the thickness of the dielectric layer (H), and the cavity resonance absorption band shows a redshift phenomenon.At the same time, the electrical resonance and cavity resonance absorption band can be coupled as an absorption band through the structural optimization of the absorber Finally, numerical simulation studies the effect of the change in incident angle on the electrical resonance and the cavity resonance absorption band.The possibility of using different resonance modes to form different absorption bands provides the possibility to modulate the double absorption band into a single absorption band.