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超材料指的是一些具有人工设计的结构,并呈现出自然材料所不具备的超常物理性质,它能够以一种新奇的方式实现对电磁波的调控。文中理论研究了单缝双环结构超材料太赫兹调制器的调制机理,运用等效电路法及微分方程法求解出调制器的共振频率与调制器本身几何参数的一般数学表达式,并用Matlab对不同调制频率情况下的几何参数进行了计算。运用CST(microwave studio)对调制器进行了理论模拟,数值模拟结果显示,该调制器频率在0.775 THz,0.95 THz和1.65 THz处共振吸收强度分别为70%,65%和68%,该结构调制器可以作为太赫兹波的调制器。
Metamaterials refer to structures that are artificially designed and exhibit the extraordinary physical properties that natural materials do not possess. They can modulate electromagnetic waves in a novel way. In this paper, the modulation mechanism of the single-material double-loop metamaterial THz modulator is studied theoretically. By using the equivalent circuit method and the differential equation method, the general mathematical expressions of the resonance frequency of the modulator and the geometric parameters of the modulator itself are studied. The geometric parameters under the modulation frequency are calculated. The theoretical simulation of the modulator was carried out by CST (microwave studio). The simulation results show that the resonant frequency of the modulator is 70%, 65% and 68% respectively at 0.775 THz, 0.95 THz and 1.65 THz. The structure modulation The device can be used as a modulator of terahertz waves.